Gimp Arm 

When cuddling, the useless arm that gets stuck in between the two cuddlers due to the lack of a better place to put it. Usually ends up by the crotch, intentionally or not.

"Are you trying to grope me?!"
"No, it's just gimp arm."

Gimp Arm by soooglow32 January 20, 2013

gimp arm 

Someone's arm that is unable to fully extend or function

Guy 1: "Hey, why is Chris shooting with his left hand? I thought he was right handed."
Guy 2: "Yeah, he has a gimp arm, it can't fully extend."

gimp arm by underpar247 October 18, 2009