1. (noun) A girl who has sex so often, whether with the same partner (nympho), or many different ones(slut), that her back seems to be constantly on a mattress.
2. a condition derived by a girl who engages in said activities.
1. "That girl is a mattress back if I ever saw one."
2. "You're gonna get mattress back if you keep sleeping around like that."
Prices shown in USD.
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from firstname.lastname@example.org. We'll never spam you.