Here's a great one for Dad! A spasm of ones legs in bed which occur beyond a person's control. Used to describe ones legs flailing & kicking during sleep. "I cant sleep in the same bed with my girlfriend, she's got a bad case of the jimmy legs, they keep me awake at night." Kramer on Jerry Seinfeld comedy show said this about his girlfriend. Fun humorous shirt makes a great Birthday or Christmas & Holiday gift.