failatio Share definition Flag The act of giving a blowjob so poorly that the male is caused to masturbate himself to completion. Guy #1: Dude that chick was smokin, did you fuck her? Guy #2: Yeah, but only after she gave me failatio! failatio by jtf81 October 14, 2009 0 0 Get merch Get the failatio mug. Buy Now — $32.95 See more merch