o-ring 

A small plastic seal used in paintball guns and on the valve of some paintball CO2 and HPA tanks.

The last time I took my tank off I blew an o-ring.

o-ring by nuage August 26, 2003

o-ring 

A circular metal ring for something to clip onto or fasten to.

The collar had an o-ring for a leash

o-ring by Psi Sushi November 8, 2003

o-ring 

A fleshy piece of skin removed from one's penis upon circumcision. Usually worn on a chain around one's neck, symbolizing coolness off the heezy fo' shizzle.

"Yo dog, dat 98,127,364 Carat o-ring is da shit fo shizzle. WERD!"

o-ring by Harvester August 19, 2003

o-ring 

(n) the moment of most intense pleasure in sexual intercourse

Whitney's excitement was so intense, she had an o-ring.

o-ring by O-ring Giver December 28, 2005

o ring blowout 

From massive amounts of anal sex, sphincter muscle becomes so loose that ones shit falls out staining ones socks.

Bruce was speed-walking in the park Monday morning after a long weekend in Palm Springs, when he suffered o ring blowout. His butt hole opened the size of a fist, and a turd fell out staining his left sock.

o ring blowout by Bald Mikey January 1, 2012

O Ring Dominated 

while having sexual intercourse thru the anus right before ejaculation the man punches his partner in the neck. her body freezes up clenching the butt hole on the males shaft. as he forces his dick out the o ring comes out of the anus. he then cuts it off very precisely and either wears it as a bracelet or necklace for a souvenir.

while fucking this girl i O Ring Dominated her and i still wear her on my wrist daily.

O Ring Dominated by Gangle monsters May 6, 2009

o-ring damage 

when the anal sphincter muscles or labia has lost elasticity due to over usage and abuse.

dear government thanks for the o-ring damage.

o-ring damage by fix america first January 17, 2014