slump cheek Share definition Flag To have sex; when you fuck a bitch well and her ass cheeks slump on your lap making the clapping sound. Damn joe. You see da ass on that bitch? Yeah i'd slump cheek. slump cheek by dc mackin November 1, 2009 0 0 Get merch Get the slump cheek mug. Buy Now — $32.95 See more merch