Top definition
The mushy brown substance around the base of your cock after you pull out of her/his asshole
"When I pulled my cock out of Henry's ass, I had an onion ring that he was happy to eat!"
by oakey1226 November 15, 2002
Happy St. Patties Day!
The act of sitting above a person.. bare ass.. sealing your butt hole around their mouth and farting.
I hooked up with this nasty bitch last night and she was just begging me to onion ring her.... then we boofed
by Brant Boekleman March 24, 2008
Happy St. Patties Day!
A term used to describe the pungent smelling arse hole of a homosexual; after being anally harrassed by a small penis with an aggressive yeast infection.
"David Furnish couldnt help but enjoy the rancid taste of Elton's onion ring."

"You cant beat a good deep fried Onion Ring"
by Monkey08 March 12, 2008
Happy St. Patties Day!
A ring piece so rancid and unwiped, it makes your eyes water.
"i went in for a piece of rear guard action, but stopped when i found she had a well battered onion ring"
by fatgitmcnulty March 07, 2007
Happy St. Patties Day!
Reference to the sphinctorial area of a cat as it faces away from you with it's tail high in the air. The tight puckered area that is staring you straight in the face as your cat turns and walks away from you as you were petting him/her.

Occasionally there will be a little left over crust on your cat's "onion ring" causing it to further resemble the onion rings from your favorite fast food establishment.
I was petting my cat, when all of a sudden he turned around and raised his butt high in the air, giving me full frontal view of his ONION RING that I didn't want. He waved his kitty ONION RING back and forth before he finally walked away. I don't have that cat anymore, sorry PETA.
by Mojo_Jojo_001 December 13, 2015
Happy St. Patties Day!
A perced vagina.
Guy1) Yo dude! I did this bitch last night and she had a onion ring!
Guy2) Dude that sick!!
Guy1) It ripped open the condom!
by Your Mom hahahahaha January 21, 2011
Happy St. Patties Day!