Onion Butt 

The foul smell you that leaks out of your ass from eating foods like Onions and Garlic.

Guy 1: (sniff sniff) Dude what's that smell?

Guy 2: Oh sorry bro my mom made garlic bread two days ago and this Onion Butt won't leave.

Onion Butt by James Hauge February 26, 2009

onion tounge 

where you eat loads of onion based foods before you go down on a girl/man, so the smell stays untill she/he notices or the next person to go down on her/him does
(Good revenge plan for cheating people)

"yeah! i onion tounged that cheating cunt"

onion tounge by general foofoo January 7, 2010

onion dip 

Slang used in some parts of Saskatchewan and Alberta to describe a person with a mediocre appearance. The third of four different ratings: Salsa, beef dip, onion dip and bean dip.

"So what did you think of Jason?"
"Meh, he was an onion dip, you could do better."

onion dip by Toria Spencer March 20, 2008

onion juice 

Shreks favorite part about raping his victims. His onion juice begins to eshrekulate as he slams and pounds into the ripping anus of his willing onion victims.

I peeled my emergency onion to summon my ogrelord shrek and he began to fill my anus with onion juice from his 15 foot ogre cock.

onion juice by Shreks willing servant February 13, 2017

onion hat 

A half ounce

Yo, you still got that onion hat?

onion hat by skatebored December 18, 2008

onion skin

Onion skin is beautiful white skin which is coveted in countries like the Philippines.

Joann’s dad did not want her to ruin her onion skin if she fell off her bike her skin would get dark and bruised. So she wasnt allowed to ride a bike.

onion skin by Sam Moj June 2, 2008

Onion Ring 

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!

Onion Ring by Your Mom hahahahaha January 22, 2011