Bumshank Share definition Flag 1. A gay. On the giving end. 2. A word that you can shout out at the end of a concert. 1. I went to pick up my pen and he got out his bumshank, now i have a sore ass. 2. "so here it is, merry christmas. Bumshank..." Bumshank by S4J January 23, 2010 0 0 Get merch Get the Bumshank mug. Buy Now — $32.95 See more merch