Gwap Share definition Flag The sound when a man's balls clap after descending stairs. Scott: I was so high last night, when I went downstairs to get a snack I gwapped so loudly I woke up my dad.Dad: It was impressive. Gwap by zetapinu June 22, 2014 0 0 Get merch Get the Gwap mug. Buy Now — $32.95 See more merch