Abreviation of "What the motherfucking fuck?" Used to
express intense confusion, exasperation, or misunderstanding. Can also be stated as "WTMFSQUARED."
"Hey man, I brought you this dead
cat carcass."
"WTMFF, dude?!
Throw that shit away!"
OR
"I'm not gonna be able to get you that half
today, dog."
"WTMFSQUARED, man? You promised."