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 a break here..."
Jogger Michael: "Aw, man come on... we got three miles to go."
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."
Jogger Michael: "Aw, man come on... we got three miles to go."
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."
by Reman "Sidepiece" Johnsons October 29, 2009
Contrary to the seemingly magnetic attraction of vaginas during scissoring, an eternal dick pendulum occurs through magnetic repulsion when attempting to "make the penises kiss."
by Ligachev March 4, 2017