football injury 

Used to describe a woman with a very wide posterior; used to describe a woman who looks as if a football was punted sideways into her ass

*woman walks by* "Oh, would you look at the football injury on that..."

football injury by Adam M. August 31, 2005

old football injury 

An injury caused by excessive masturbation in a man over the age of 30.

Girl: Aw, what happened? Why is your arm in that sling?

Guy: It's an old football injury.

old football injury by nolookhook January 23, 2009