masturbator's cramp
Pain and swelling in the muscle around the mid-arm, elbow area which is caused by excessive masturbating. Not to be confused with Gamer's Wrist.
"Look at that huge whelp on Johnny's arm. Think he gets beaten?"
"Nah, it's probably Masturbator's Cramp."
"Nah, it's probably Masturbator's Cramp."