When a lesbian OR straight man puts three of his fingers into the girl's holes; putting the index into the urethra hole, the middle finger into the vagina hole, and the pinky into the asshole. This is done by positioning their hand like a number "3," holding their ring finger underneath their thumb.
Oh man! Last night, Willy gave Amanda a tripple finger!
by YUUUUUUUCK :-) April 24, 2009