shaking one's willy in an eccentric and exciting manner. often resulting in hilarious and wet consequences. can be used as a form of foreplay or to attract other people to engage in the mating process, much like a peacock displays her feathers to attract a mate. a male human will often display his willy in an appealing way to gain sexual prowess.
i am going to use my extreme flapping capabilities to attract a mate at the club tonight.