Onion Bomb 

A beer with an onion in it. Chug down the beer then eat the onion whole

Keegan did an onion bomb.

Onion Bomb by Big C-dawg December 13, 2008

onion bomb 

The worst smelling far known to man. Made from eating the little chopped up onions from a McDonalds cheesburger or any other patty burger in which they are on. The smell derives from the circular motion is made while syphoning out the smell of the 'onion bomb'

After eating at McDonalds, I left a few onion bombs in my buddies car they stayed in the cloth of the seats for weeks...

onion bomb by m00m00 May 13, 2005

OnionBomb 

The action of when white male ejaculates into your mouth spontaneously.

Jack OnionBomb'd me when we hooked up last night.

OnionBomb by JackIrving April 29, 2020