Fangs Berry mush Share definition Flag A internet bastardization of Cockney rhyming slang for "thanks very much." Julie: I just made you waffles.David: Fangs, Julie, fangs berry mush. Fangs Berry mush by Joe McGoat February 8, 2010 0 0 Get merch Get the Fangs Berry mush mug. Buy Now — $32.95 See more merch