Mattress Bra

A bra with so much padding/push up that the extra volume alone is larger than the size of someone's boobs. Mattress bras are usually extremely thick and uncomfortable to wear.

"Dude, this chick I took home last night had MASSIVE TITS. I was so excited until she took off her mattress bra and she went from a DD to a B at best..."

by UrbanDictionaryDoctrine May 30, 2017

mattressback

A fireman who sleeps on the job. Policemen frequently refer to firemen as "mattressbacks"

We here at the copshot work twice as hard as those lazy mattressbacks over at the fire station.

by Toddisgreat January 21, 2010

Mattressbating

The delicate act of dry humping your mattress into submission until you cum

Oh, I was mattressbating there like an hour ago, you wanna play some Oreos?

by Wildcardbitch69 December 3, 2010

mattressback

A slang term for a prostitute,; a woman who makes a living on her back.

A mattressback spends as much time as possible on her back, making money.

by shomesomethin July 13, 2010