While having sex with a girl in the doggie style position with hands on her hips, one would slide thumb into girl's asshole and at same time say "DING DONG".
When a man stands with his legs apart and moves his hips from side to side so that his balls and penis hit the inside of his legs causing a load smacking sound.
Swigart gets turned on when he seeDanza Ringing Big Ben.
When someone rides in a car in the trunk (because there aren't enough seats, they're sneaking into a drive-in, getting kidnapped, etc.). I'm not sure where this comes from -- a friend of mine said it once and then 2 years later I asked him about it and he insisted that he'd never heard of it before (LIAR!). If anyone knows its origin please post it.
I can only fit six in my car -- looks like someone's gonna be riding superman.