When the adjective floppin is used to describe bro it refers to him having a large penis that he enjoys to flop out of his pants. This is done to make those around him uncomfortable and to show he has a much larger penis than you.
Dude if I see that Floppin Bro's dick one more time I'm going to kick his ass.
by Monster D September 11, 2009
Can you define these popular missing words?