Short for whatever, is used commonly by people in a context of a conversation where they know the other person is right, don't want to admit it, and can think of no coherent argument to the contrary.
Brett: See man, you can tell I was totally right, Pluto is not longer a planet.
Watch the video. Use whenever you need to tell someone to watch a youtube video that they seriously need to watch.
*you send a link*
*person changes subject*
wtv!
*person watches and comments on video*
By Velma
Wtv
short form of whatever, used by Michelle when she really really wants to end an argument and give her victim no way back. Usually results in said victim being crestfallen.