Bombay Slapjack Share definition Flag The act of defecation upon your partner's tits,then.......TITWANK!!! "Fancy coming back to mine for a Bombay Slapjack?!?!" Bombay Slapjack by Rorymotion May 10, 2009 0 0 Get merch Get the Bombay Slapjack mug. Buy Now — $32.95 See more merch