Vagina, specifically when seen from behind as a female bends over. This is due to the onion shape that the vagina takes when in this position.
by ALIS December 3, 2014

Onion is usually not the sharpest tool in the shed but makes people laugh but doesn’t like complimenting himself onion can be quite prickly sometimes
by I’m gonna was November 7, 2019

by Uncle Kurn June 6, 2011

An blow to someone else's ego, whether by verbal insult or physical embarrassment.
Derived from CBS college basketball announcer Bill Raftery's use of the term after one team hits a big shot to crush the other team.
Derived from CBS college basketball announcer Bill Raftery's use of the term after one team hits a big shot to crush the other team.
by 3Pointer December 25, 2005

by J.L.A. March 2, 2015

better than the word "killin'" and a synonym for the word "braume"; something/someone extremely cool. beyond words.
by shwee-doo May 4, 2011

A youtuber that makes videos making fun of emo kids and a brutally honest person... Sell actually he is called onision but fuck that cause that cuck is an onion...
Fan 1: I luv u onion
Fan 2: uhm actually it's onision u faggot
Fan 1: actually shut the fuck up
Fan 3: onision ships PHAN!!!1!!¡¡1!
Fan 2: uhm actually it's onision u faggot
Fan 1: actually shut the fuck up
Fan 3: onision ships PHAN!!!1!!¡¡1!
by Imphanicing June 24, 2016
