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.
by dicklicker May 23, 2003

by Ooogalie Boogalie May 22, 2003

by MegaMan_C_ February 09, 2004

by kagent December 28, 2005

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.
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.
by Khashishi April 20, 2010

by longhairedwizardwithlazyeye October 16, 2008

by stew piddasso October 07, 2006
