Lenny Flop Share definition Flag The act of flopping a turd on your partners face and licking it off. Brian totally gave Jim a Lenny flop last night. I heard it was a mess and they had to buy new bedding. Lenny Flop by Kemo Anderson May 27, 2010 0 0 Get merch Get the Lenny Flop mug. Buy Now — $32.95 See more merch