Burst Mattress 

A burst mattress pertains to a vagina or gootherus that is not well kept. The pubic hair protrudes out the sides of the underwear, resembling a well worn mattress, with its stuffing coming through the seams

“Her lady garden hasn’t had a gardener in a while, it looks like a burst mattress “

Burst Mattress by Gootherologist2020 November 25, 2020

Shot the mattress 

Huge mistake; major dumb move. Origin: My husband thought he was going to dry fire a .32 but ended up shooting a round in our brand new mattress and it is not even paid off.

I wanted to get to work on time, but I shot the mattress on that one.

Shot the mattress by Propa-Gandhi July 4, 2017

flip my mattress 

to temporarily or permanently change one's sexual preference

ie: a straight girl says, "I'd definitely flip my mattress for her!"

flip my mattress by ToniG March 4, 2009

with a mattress in the back 

a way to spice up any sentence in a way that even "your mom", "that's what she said", or "in your granny's oven" can not achieve; from the hit movie edward scissorhands.

Bob: I did some gardening today.
Fred: ...WITH A MATTRESS IN THE BACK!

with a mattress in the back by Nellie Lovett May 3, 2008

knocking shop mattress 

An effect of male pattern baldness,whereby the unfortunate male decides not to do the decent thing ie get the clippers out and grows the floundering folicles hoping to conceal the onset of nature by creative combing,suceeding only in an elaborate , threadbare shaping with a shiney(often sunburnt)beacon of scalp shining through for all to see.Resembling the aformentioned sex workers overused mattress.See Robin Gibb,Footballer Kenny Cunningham etc

See that Alan Shearer on Match of the Day,he's got a head like a knocking shop mattress,though his muscular pressence up front,will be sorely missed by Newcastle this season.

knocking shop mattress by chris ord August 31, 2006

set up the air mattress 

When you run upstairs and have lightning fast sex with your boyfriend while the houseguest uses the bathroom.

Houseguest: "where are you guys?"

Boyfriend: "just setting up your air mattress!"

Hurry up, let's go set up the air mattress - we only have 4 minutes!

set up the air mattress by odie74 June 28, 2017

Ground Mattress 

A military term used for a female soldier who sleeps around a fair bit. Related to the inflatable or foam mats used in the field, she is often under found a male soldier.

"Did you see the ground mattress in the other platoon?"
"I think everyone's had a go with that (ground) mattress"

Ground Mattress by Dickie613 February 10, 2009