dirty onion 

When you give someone rough anal sex that makes they're eyes water like they have been peeling onions.

I gave Mandy a dirty onion last night.

dirty onion by blongly January 14, 2008

Stale onion 

When one fists someone's orifice with a dirty, unwashed fist that they just used to fist a different orifice on that person.

"Billy took me to the roller rink last night and fisted me behind the pinball machines and then gave me a stale onion."

Stale onion by cranberryzero November 2, 2007

Family onion 

A large round butt that is passed on through generations.

"Damn she got the family onion!"
"I want to harvest her family onion."

Family onion by Fake mountain August 16, 2017

Soviet Onion

Soviet Union but it's now Onion
The flag now has an Onion on it

Instead of people, there are communist ONIONS

Soviet Onions are funny

Soviet Onion by Bubble Baby 1234 March 6, 2021

Creamed Onion 

Cumming in a girl's armpit

Bro I wanted to try some freaky shit and Jessica finally let me give her a creamed onion

Creamed Onion by Butnuster69 July 4, 2021

Dirty rotten onion 

Someone who likes to sleep with multiple partners. A slut. Onions have layers (sluts get laid a lot by... layers).

Kristy is a dirty rotten onion.

Dirty rotten onion by Forphucsake March 18, 2014

The Onion Ring

When you sprinkle bread crumbs on a sweaty asshole and then you proceed to fuck them in the ass. The result is the scent of onion rings coming from the asshole.

Last night, my girlfriend asked me if I would like to do the onion ring!

The Onion Ring by Ceez Usmc April 20, 2009