monkey cups Share definition Flag The alternative label for Reese's Peanut Butter Cups and/or boobies. It can also be used in song to sound slightly inappropiate... I need me some Monkey Cups!Song: Monkey Cups! You've got the cutest little monkey cups! monkey cups by Gordeuk5150 May 22, 2012 0 0 Get merch Get the monkey cups mug. Buy Now — $32.95 See more merch