flapslap Share definition Flag A facial slap with the use of ones flap. The female equivalent of a dickslap. "If he advertises his band to me on myspace one more time i swear to god i'll flapslap the entire band myself" flapslap by hazbad April 29, 2007 0 0 Get merch Get the flapslap mug. Buy Now — $32.95 See more merch