Gym boner

Gym boner is the awkward boner men gets during leg raise type of activities. It's caused by type of underwear or shorts men wear at the time. Men usually hate this because since it's not an actual boner there is no blood circulation in penis therefore penis seems very small.

I was doing decline press when I noticed that I had a gym boner.

Gym boner by BotCreon January 9, 2014

Boner in Gym Class 

Saying men use to compare something extremely embarrassing, to. Derived from experience some male teenagers go threw in which they get an erection in a gym class that ends up being extremely noticeable because of the loose basketball shorts everyone must wear in gym class.

Steve, "Dude did you just fart in front of Lisa?"
Brad, "Yeah, it was more embarrassing then a boner in gym class!"

Boner in Gym Class by atrain595 June 1, 2011