happy clap Share definition Flag when a male thrusts forward so quickly, his dick and balls slap against his stomache, causing a "clapping" sound Sarah: At Lisa's party we dared Steven to happy clap for a beer and he did it..twice! happy clap by chandramukhi January 23, 2008 0 0 Get merch Get the happy clap mug. Buy Now — $32.95 See more merch