Where you extend the foreskin of your nutsack to form a "trampoline" and you bounce your penis off it creating the effect of a trampoline.
Guy 1: Hey dude, check this out
Guy 2: Ohhhh man... wtf
Guy 3: THE TRAMPOLINE!
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from firstname.lastname@example.org. We'll never spam you.