The implementation of the middle finger's knuckle administered freely preceeding the initial use of the index finger to any part of the member's genitalia.
1.)like the expression "KABOOM" instead has the word "fucked" at the end of it.
2.)action word for getting fucked or owned(SAID ONLY WHEN THE INJURY LANDS SPOT ON.)
GUY#1:"the car's comin' straight to him."
GUY#2:"5..4..3..2....1..KAFUCKED!!! oh god, he's not waking upanytime soon.