The type of sex one has on impulse, without romantic buildup or emotional thoughtfulness, but with animal lust and urgent necessity.
"We're going to do it like rabbits that just got out of prison"
Sex that is really quick and emotionless; sex like that practiced by Eminem's character in the film 8 Mile.
hump hump hump hump orgasm reflexhump done
"Oh, he's cute."
"Yeah, but I hear all you'll ever get from him is rabbitsex."