look up any word, like blumpkin:
 
8.
a black plastic ring that slips in between a paintball guns c02 tanks, and where it screws into the gun. Acts as a "seal" so no c02 escapes.
My o rings broke and air is leaking from my tank.
by Shayz0r December 24, 2005
 
1.
Muscle of the anal opening. Can be easily ruptured through violent anal sex.
Sorry if my 12-incher tore your o ring.
by MegaMan_C_ February 09, 2004
 
2.
The seal around a person anus.
She road the bone rollercoaster so much her o rings are blown. Causing skid marks in her panties.
by kagent November 23, 2005
 
3.
commonly used slang referring to the sphincter.
"dude, that fart was so vicious, i think i blew out my o-ring."
by ryan ingersol March 07, 2005
 
4.
Anal muscles.
1. My O-ring is a virgin.
2. If you don't slow down, you'll blow my O-ring!
by The nazi of Yatzee November 07, 2002
 
5.
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 !"
by Jake March 06, 2004
 
6.
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
by longhairedwizardwithlazyeye August 25, 2008
 
7.
use your phone to record a girl orgasming while you're having sex with her, then set that recording as her personal ringtone when she calls you.
<your phone rings>
friend - "WTF? that sounds like theresa, but what's happening to her?"
you - "oh, that's theresa's o ring"
by JON MASSIE December 05, 2009