Here is a list of all slash (/) emotes in the game.

EmoteGeneralWith Target
/agreeYou agree.You agree with target.
/amazeYou are amazed!You are amazed by target.
/angryYou raise your fist in anger.You raise your fist in anger at target.
/apologizeYou apologize to everyone. Sorry!You apologize to target. Sorry!
/applaud, /applauseYou applaud. Bravo!You applaud at target. Bravo!
/attacktargetYou tell everyone to attack something.You tell everyone to attack target.
/barkYou bark. Woof woof!You bark at target.
/bashfulYou are bashful.You are so bashful...too bashful to get target's attention.
/beckonYou beckon everyone over to you.You beckon target over.
/begYou beg everyone around you. How pathetic.You beg target. How pathetic.
/belchYou let out a loud belch.You burp rudely in target's face.
/biteYou look around for someone to bite.You bite target. Ouch!
/bleed, /bloodBlood oozes from your wounds. 
/blinkYou blink your eyes.You blink at target.
/blowYou blow a kiss into the wind.You blow a kiss to target.
/blushYou blush.You blush at target.
/boggleYou boggle at the situation.You boggle at target.
/bonkYou bonk yourself on the noggin. Doh!You bonk target on the noggin. Doh!
/boredYou are overcome with boredom. Oh the drudgery!You are terribly bored with target.
/bounceYou bounce up and down.You bounce up and down in front of target.
/bowYou bow down graciously.You bow before target.
/bravoYou applaud. Bravo!You applaud at target. Bravo!
/brbYou let everyone know you'll be right back.You let target know you'll be right back.
/burpYou let out a loud belch.You burp rudely in target's face.
/byeYou wave goodbye to everyone. Farewell!You wave goodbye to target. Farewell!
/cackleYou cackle maniacally at the situation.You cackle maniacally at target.
/calmYou remain calm.You try to calm target down.
/cat, /cattyYou scratch yourself. Ah, much better!You scratch target. How catty!
/chargeYou start to charge. 
/cheerYou cheer!You cheer at target.
/chewYou begin to eat.You begin to eat in front of target.
/chickenWith arms flapping, you strut around. Cluck, Cluck, Chicken!With arms flapping, you strut around target. Cluck, Cluck, Chicken!
/chuckleYou let out a hearty chuckle.You chuckle at target.
/clapYou clap excitedly.You clap excitedly for target.
/coldYou let everyone know that you are cold.You let target know that you are cold.
/comfortYou need to be comforted.You comfort target.
/commendYou commend everyone on a job well done.You commend target on a job well done.
/confusedYou are hopelessly confused.You look at target with a confused look.
/congrats, /cong, /congratulateYou congratulate everyone around you.You congratulate target.
/coughYou let out a hacking cough.You cough at target.
/cowerYou cower in fear.You cower in fear at the sight of target.
/crackYou crack your knuckles.You crack your knuckles while staring at target.
/cringeYou cringe in fear.You cringe away from target.
/cryYou cry.You cry on target's shoulder.
/cuddleYou need to be cuddled.You cuddle up against target.
/curiousYou express your curiosity to those around you.You are curious what target is up to.
/curtseyYou curtsey.You curtsey before target.
/danceYou burst into dance.You dance with target.
/disappointed, /disappointmentYou frown.You frown with disappointment at target.
/dohYou bonk yourself on the noggin. Doh!You bonk target on the noggin. Doh!
/doomYou threaten everyone with the wrath of doom.You threaten target with the wrath of doom.
/drinkYou raise a drink in the air before chugging it down. Cheers!You raise a drink to target. Cheers!
/droolA tendril of drool runs down your lip.You look at target and begin to drool.
/duckYou duck for cover.You duck behind target.
/eatYou begin to eat.You begin to eat in front of target.
/excitedYou talk excitedly with everyone.You talk excitedly with target.
/eyeYou cross your eyes.You eye target up and down.
/facepalmYou cover your face with your palm.You look over at target and cover your face with your palm.
/farewellYou wave goodbye to everyone. Farewell!You wave goodbye to target. Farewell!
/fartYou fart loudly. Whew...what stinks?You brush up against target and fart loudly.
/fearYou cower in fear.You cower in fear at the sight of target.
/feastYou begin to eat.You begin to eat in front of target.
/fidgetYou fidget.You fidget impatiently while waiting for target.
/flapWith arms flapping, you strut around. Cluck, Cluck, Chicken!With arms flapping, you strut around target. Cluck, Cluck, Chicken!
/fleeYou yell for everyone to flee!You yell for target to flee!
/flexYou flex your muscles. Oooooh so strong!You flex at target. Oooooh so strong!
/flirtYou flirt.You flirt with target.
/flopYou flop about helplessly.You flop about helplessly around target.
/followmeYou motion for everyone to follow.You motion for target to follow.
/foodYou are hungry!You are hungry. Maybe target has some food...
/frownYou frown.You frown with disappointment at target.
/gaspYou gasp.You gasp at target.
/gazeYou gaze off into the distance.You gaze eagerly at target.
/giggleYou giggle.You giggle at target.
/gladYou are filled with happiness!You are very happy with target!
/glareYou glare angrily.You glare angrily at target.
/gloatYou gloat over everyone's misfortune.You gloat over target's misfortune.
/golfclapYou clap half heartedly, clearly unimpressed.You clap for target, clearly unimpressed.
/goodbyeYou wave goodbye to everyone. Farewell!You wave goodbye to target. Farewell!
/greet, /greetingsYou greet everyone warmly.You greet target warmly.
/grinYou grin wickedly.You grin wickedly at target.
/groanYou begin to groan.You look at target and groan.
/grovelYou grovel on the ground, wallowing in subservience.You grovel before target like a subservient peon.
/growlYou growl menacingly.You growl menacingly at target.
/guffawYou let out a boisterous guffaw!You take one look at target and let out a guffaw!
/hailYou hail those around you.You hail target.
/happyYou are filled with happiness!You are very happy with target!
/healmeYou call out for healing! 
/helloYou greet everyone with a hearty hello!You greet target with a hearty hello!
/helpmeYou cry out for help! 
/hiYou greet everyone with a hearty hello!You greet target with a hearty hello!
/highfiveYou put up your hand for a high five.You give target a high five!
/hugYou need a hug!You hug target.
/hungryYou are hungry!You are hungry. Maybe target has some food...
/impatientYou fidget.You fidget impatiently while waiting for target.
/incomingYou warn everyone of incoming enemies!You point out target as an incoming enemy!
/insultYou think everyone around you is a son of a motherless ogre.You think target is the son of a motherless ogre.
/introduceYou introduce yourself to everyone.You introduce yourself to target.
/jkYou were just kidding!You let target know that you were just kidding!
/kissYou blow a kiss into the wind.You blow a kiss to target.
/kneelYou kneel down.You kneel before target.
/knucklesYou crack your knuckles.You crack your knuckles while staring at target.
/laughYou laugh.You laugh at target.
/lavishYou praise the Light.You lavish praise upon target.
/lay, /laydown, /lie, /liedownYou lie down.You lie down before target.
/lickYou lick your lips.You lick target.
/listenYou are listening!You listen intently to target.
/lolYou laugh.You laugh at target.
/lostYou are hopelessly lost.You want target to know that you are hopelessly lost.
/loveYou feel the love.You love target.
/madYou raise your fist in anger.You raise your fist in anger at target.
/massageYou need a massage!You massage target's shoulders.
/moanYou moan suggestively.You moan suggestively at target.
/mockYou mock life and all it stands for.You mock the foolishness of target.
/mooMooooooooooo.You moo at target. Mooooooooooo.
/moonYou drop your trousers and moon everyone.You drop your trousers and moon target.
/mountspecialRear-up animation for all mounts (including flying). Works only when mounted 
/mournIn quiet contemplation, you mourn the loss of the dead.In quiet contemplation, you mourn the death of target.
/noYou clearly state, NO.You tell target NO. Not going to happen.
/nodYou nod.You nod at target.
/nosepickWith a finger deep in one nostril, you pass the time.You pick your nose and show it to target.
/oomYou announce that you have low mana! 
/openfireYou give the order to open fire. 
/panicYou run around in a frenzied state of panic.You take one look at target and panic.
/partyYou raise a drink in the air before chugging it down. Cheers!You raise a drink to target. Cheers!
/patYou need a pat.You gently pat target.
/peerYou peer around, searchingly.You peer at target searchingly.
/peonYou grovel on the ground, wallowing in subservience.You grovel before target like a subservient peon.
/pestYou shoo the measly pests away.You shoo target away. Be gone pest!
/pickWith a finger deep in one nostril, you pass the time.You pick your nose and show it to target.
/pityYou pity those around you.You look down upon target with pity.
/pizzaYou are hungry!You are hungry. Maybe target has some food...
/pleadYou drop to your knees and plead in desperation.You plead with target.
/pointYou point over yonder.You point at target.
/pokeYou poke your belly and giggle.You poke target. Hey!
/ponderYou ponder the situation.You ponder target's actions.
/pounceYou pounce out from the shadows.You pounce on top of target.
/praiseYou praise the Light.You lavish praise upon target.
/prayYou pray to the Gods.You say a prayer for target.
/purrYou purr like a kitten.You purr at target.
/puzzledYou are puzzled. What's going on here?You are puzzled by target.
/questionYou want to know the meaning of life.You question target.
/raiseYou raise your hand in the air.You look at target and raise your hand.
/raspYou make a rude gesture.You make a rude gesture at target.
/rdy, /readyYou let everyone know that you are ready!You let target know that you are ready!
/rearYou shake your rear.You shake your rear at target.
/roarYou roar with bestial vigor. So fierce!You roar with bestial vigor at target. So fierce!
/roflYou roll on the floor laughing.You roll on the floor laughing at target.
/rudeYou make a rude gesture.You make a rude gesture at target.
/saluteYou stand at attention and salute.You salute target with respect.
/scaredYou are scared!You are scared of target.
/scratchYou scratch yourself. Ah, much better!You scratch target. How catty!
/sexyYou're too sexy for your tunic...so sexy it hurts.You think target is a sexy devil.
/shakeYou shake your rear.You shake your rear at target.
/shimmyYou shimmy before the masses.You shimmy before target.
/shindigYou raise a drink in the air before chugging it down. Cheers!You raise a drink to target. Cheers!
/shiverYou shiver in your boots. Chilling!You shiver beside target. Chilling!
/shooYou shoo the measly pests away.You shoo target away. Be gone pest!
/shrugYou shrug. Who knows?You shrug at target. Who knows?
/shyYou smile shyly.You smile shyly at target.
/sighYou let out a long, drawn-out sigh.You sigh at target.
/sillyYou tell a joke.You tell target a joke.
/slapYou slap yourself across the face. Ouch!You slap target across the face. Ouch!
/sleepYou fall asleep. Zzzzzzz.You fall asleep. Zzzzzzz.
/smellYou smell the air around you. Wow, someone stinks!You smell target. Wow, someone stinks!
/smileYou smile.You smile at target.
/smirkA sly smirk spreads across your face.You smirk slyly at target.
/snarlYou bare your teeth and snarl.You bare your teeth and snarl at target.
/snickerYou quietly snicker to yourself.You snicker at target.
/sniffYou sniff the air around you.You sniff target.
/snubYou snub all of the lowly peons around you.You snub target.
/sobYou cry.You cry on target's shoulder.
/sootheYou need to be soothed.You soothe target. There, there...things will be ok.
/sorryYou apologize to everyone. Sorry!You apologize to target. Sorry!
/spitYou spit on the ground.You spit on target.
/spoonYou need to be cuddled.You cuddle up against target.
/stareYou stare off into the distance.You stare target down.
/stinkYou smell the air around you. Wow, someone stinks!You smell target. Wow, someone stinks!
/strongYou flex your muscles. Oooooh so strong!You flex at target. Oooooh so strong!
/strutWith arms flapping, you strut around. Cluck, Cluck, Chicken!With arms flapping, you strut around target. Cluck, Cluck, Chicken!
/surprisedYou are so surprised!You are surprised by target's actions.
/surrenderYou surrender to your opponents.You surrender before target. Such is the agony of defeat...
/talkYou talk to yourself since no one else seems interestedYou want to talk things over with target.
/talkexYou talk excitedly with everyone.You talk excitedly with target.
/talkqYou want to know the meaning of life.You question target.
/tapYou tap your foot. Hurry up already!You tap your foot as you wait for target.
/tauntYou taunt everyone around you. Bring it fools!You make a taunting gesture at target. Bring it!
/teaseYou are such a tease.You tease target.
/thank, /thanksYou thank everyone around you.You thank target.
/thirstyYou are so thirsty. Can anyone spare a drink?You let target know you are thirsty. Spare a drink?
/threat, /threatenYou threaten everyone with the wrath of doom.You threaten target with the wrath of doom.
/tickleYou want to be tickled. Hee hee!You tickle target. Hee hee!
/tiredYou let everyone know that you are tired.You let target know that you are tired.
/train"Choo Choo Train" animation and sound 
/tyYou thank everyone around you.You thank target.
/vetoYou veto the motion on the floor.You veto target's motion.
/victoryYou bask in the glory of victory.You bask in the glory of victory with target.
/violinYou begin to play the world's smallest violin.You play the world's smallest violin for target.
/volunteerYou raise your hand in the air.You look at target and raise your hand.
/waitYou ask everyone to wait.target asks target to wait.
/waveYou beckon everyone over to you.You wave at target.
/weepYou cry.You cry on target's shoulder.
/welcomeYou welcome everyone.You welcome target.
/whineYou whine pathetically.You whine pathetically at target.
/whistleYou let forth a sharp whistle.You whistle at target.
/wicked, /wickedlyYou grin wickedly.You grin wickedly at target.
/winkYou wink slyly.You wink slyly at target.
/wootYou cheer!You cheer at target.
/workYou begin to work.You work with target.
/wrathYou threaten everyone with the wrath of doom.You threaten target with the wrath of doom.
/yawnYou yawn sleepily.You yawn sleepily at target.
/yayYou are filled with happiness!You are very happy with target!
/yesYou nod.You nod at target.
/ywYou were happy to help.You were happy to help target.
Complete List of WoW Emotes