Blow a fish out of one's ass Share definition Flag An expression which helps create an image of how angry one is/was at the time. "I was so pissed I almost blew a fish out of my ass!" Blow a fish out of one's ass by Bettie Who May 1, 2005 0 0 Get merch Get the Blow a fish out of one's ass mug. Buy Now — $32.95 See more merch