Open-Mouthed Breather 

Someone who keeps their mouth open, often with tongue sticking out; appearing mentally deficient. Implying the person has brain damage or is mentally deficient.

All his friends were idiots and morons; the biggest collection of open-mouthed breathers I've ever seen.

Open-Mouthed Breather by Timbotron3000 May 30, 2006

open asshole

The worst of the worst; the very bottom of the barrel.

"AOL is the big, stinky open asshole of the ISP world."

open asshole by Johnny Christmas September 17, 2003

open and shut 

01: Simple, straightforward, easily solved.
02: So obvious as to present no difficulties; easily settled or determined.

With DNA evidence and three eyewitnesses, the prosecutor said this is an open and shut case.

open and shut by Mr. Terrence L. Trezvant November 30, 2004

open chest 

when someone receives a punch to the chest because their chest was left unprotected.

i got a bad bruise on my chest because donte got me with open chest earlier

open chest by oxdanig November 2, 2007

open bobs 

Used by miscers, body builders from forums on the internet. Typically used to ask a girl on webcam to show her boobs.

open bobs pls.

open bobs by tinychatter September 15, 2013

open-legged 

Usually in relation to promiscuous women, the questionable quality of being quick to open one's legs for the purpose of sexual intercourse.

"You're gonna love it down there, their women are famous for being very open-legged about things."

open-legged by Fetitza November 23, 2006

Open-faced roast beef sandwich 

A vagina with large inner lips, that extend past the outer lips.

Her reminded me of an open-faced roast beef sandwich so much that I just had to eat it.

Open-faced roast beef sandwich by hr-rp January 5, 2007