A potentially painful condition
in which a male, often wearing boxers or no underwear, is walking or jogging
and the testicles and/or flaccid penis repeatedly slaps against
the inner thighs.
Jogger Chad: "Dude... ok, I gotta take
Jogger Michael: "Aw, man come on... we got three miles
Jogger Chad: "Dude... fucking got pendulum penis going on right now, k? Gimme a freaking break
Jogger Michael: "For Christ's sake, you said that two minutes ago."
Jogger Chad: "Fuck off! I thought I had the testies
of Papa Smurf last time I tried to tough it out... couldn't beat
off for two days."