1 definition by Remy Leus
The act of stretching out your ball sack like a trampoline, and using it to bounce your flaccid (or partially flaccid (see half-chub)) penis up and down.
See: flappy bird nest
See: flappy bird nest
Mike Hawk: Dude I was bored the other day so I started playing with my flappy bird.
Jack Mehoff: Me too! But I bounced it too hard and sac taped myself.
Jack Mehoff: Me too! But I bounced it too hard and sac taped myself.
by Remy Leus January 31, 2014