A Hawaiian slang term meaning a punch to the face and, from what I thought, often done without much more than a verbal warning at most. A surprise punch that catches the recipient at least somewhat off-guard.
Also just to "false" or getting "falsed"
Also "dirty cracks" or "dirty lickings"
Dey wuz arguing for so long until James jus wen false crack em!!!
He was talking shit so I falsed dat faka and he wen drop li' dat!!!