Woopie Goldberg Share definition Flag is when a girl or man keeps getting there butt slapped till it gets a red color, usually during sex. Dude, while we were doing it i kept slapping her ass so much i think i gave her a Woopie Goldberg. Woopie Goldberg by zerobeat121 February 3, 2012 0 0 Get merch Get the Woopie Goldberg mug. Buy Now — $32.95 See more merch