What the fuck was that for
Person 1: *Slaps across face*
Person 2: DUDE?!!? WTFWTF?
An acronym for "what the fuck was that fucking shit". Commonly said when someone fucks up big time, typically something simple that you think couldn't be fucked up.
Counter-Strike, last round, 5 people v 1 person, should be an easy win -- the 1 guy kills the entire team of 5.
"Are you kidding me?!? WTFWTFS?!?!?"