Short hand for: What The Fuck Laughing My Ass Off Laugh Out Loud Oh My God Shut The Fuck Up Rolling Over From Laughter Age Sex Location Do What I Mean Not What I Say Ok Thanks Goodbye Talk To You Later Die!
As you can see it is quite useful. Yet only noobs and losers use it.
Mac fagot : I like monkeys
Normal person : Man you are crazy, whats wrong with you?
Mac Fagot : Monkeys say wtf all the time
Noral : Ok, you are insane you cultist fool wtfmonkey just makes no sense
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.