o- ring

Another term for cock ring. A ring of either rubber or leather that is placed around the scrotum and penis to constrict the flow of blood to the male organ, allowing for larger, longer-lasting erections and more intense orgasms. Also worn to make the male pubic region stand out better, making the bulge in one's pants more pronounced so that other men think you have a bigger package.

I used a rubber o-ring that was too tight and my boner wouldn't go down. Now I can't get the fucking thing off.

o- ring by dicklicker May 23, 2003

o- ring

Rectum

Hey buddy don't push out that turd to hard,you'll blow out your o-ring.

o- ring by Ooogalie Boogalie May 22, 2003

o ring

Muscle of the anal opening. Can be easily ruptured through violent anal sex.

Sorry if my 12-incher tore your o ring.

o ring by MegaMan_C_ February 9, 2004

o-ring 

1. (slang) sphincter
2. (normal) a rubbery gasket used to seal a connection between two pipes. The o-ring is squished between two flanges, forming an air-tight seal.

Don't push too hard or you'll bust your o-ring.

o-ring by Khashishi April 20, 2010

o ring

your brown eye, bunghole, or the muscle that holds your turtle head in.

dude i just took a massive dookie, i almost blew my o ring

o ring by longhairedwizardwithlazyeye October 16, 2008

O-ring 

Anal muscles.

1. My O-ring is a virgin.
2. If you don't slow down, you'll blow my O-ring!

O-ring by The nazi of Yatzee November 7, 2002

O Ring

a round seal, often made of neoprene or some other compressible "rubber-like" compound, that is an industrial part.Looks like the part of a condom that unrolls before you actually unroll it. Can be used as a cock ringif you get the right size

"My buddy's a mechanic, I went thru his box of assorted O rings and found the size I can use as a cock ring. Nancii's gonna beg for mercy tonite !"

O Ring by Jake March 6, 2004