crotch onion 

(n.) an unwashed, smelly ballsack. A person who suffers from is condition may be referred to as an "onion crotch."

Just let Buster get in there and give your nuts a sniff, Nate. He's a good dog, and he sure knows a crotch onion when he catches whiff of one!

crotch onion by Blenderhead91 June 21, 2012

Sad Onion 

A face on most toy packaging showing the toy is not for ages 0-3, that is sad and looks more like an onion.

The packaging has the sad onion, as almost always.

Sad Onion by Mr. EMdfM August 6, 2017

Glass Onion 

Originating from the Beatles song "Glass Onion" off their 1968 self-titled, or "white" album, the term was believed to mean a glass-lidded coffin by the followers of the Paul is Dead conspiracy.
The real meaning of the song is that people were over-analyzing the Beatles' lyrics.
A glass onion is something that would have layer after layer peeled away, only to realise that it was transparent all along.

Lookin' through a glass onion.

Glass Onion by t3h1337f00l August 27, 2006

Brown Onion 

The least attractive female of a group of females.

Whoa... Hen's Night. Look at all those Peaches!

And one Brown Onion.

Brown Onion by Lord_Cunnington November 22, 2011

French Onion 

When you dive into a gorgeous ass on a hot chick, you know the one that's like an onion and makes ya wanna cry, but you end up encountering a smelly, sweaty, mung bunghole and you have no choice but to retreat.

Joe picked up a hot chick at the bar and took her home for some hot drunken sex. He went down to eat da booty but encountered a French Onion and after gagging asked her to go shower first.

French Onion by Eaton Holgoode November 24, 2015

The Onion

"America's Finest News Source." A satirical that makes fun of American politics and pop culture.

This article by The Onion is hilarious!

The Onion by Jon December 31, 2003

green onion cake 

When you accidentally give oral sex to someone with poor genital hygiene.

Luke: Shit man, you don't look so good!
Cornelius: I just had a green onion cake...

green onion cake by Urs V September 28, 2008