I): The act of inhaling large quantities of vaporized Crystal Methamphetamines.

II): An over-sized unit of measurement particularly when used to describe the comparative units of inhalative substances pertaining to Crystal Meth.
Billy "Lets get effed right up, I wanna do mongo tokes till my toes tingles and my hair feels like a hat"

Pino "I dont know if I want to, Jimmy is gonna sketch out, MONGO style."

Armando "Jimmy's cute, I bet he's got a mongo package."

Pino and Billy "SICK MAN, YOUR A MONGO FAG!"
by John Kimbell January 6, 2007
Get the MONGO mug.
Stands for Money Or Nothing Goes On.

Originates from Mongo member of UK hiphop group Mud Family.
A Mongo Situation
by Jam December 12, 2003
Get the Mongo mug.
The name plaved on the Downies who reside in a large casino/*shaft* near Palm Springs in The Sovereign Nation of Mongo.
If you live in the Sovereign Nation of Mongo (Morongo), does that make you a Mongoloid? ..says Chris. No, says April... This makes you a Downie.
by Chris Klink March 7, 2006
Get the Mongo mug.
sam marino while riding his skateboard
Frodo and Samwaise were seen pushing mongo down the steep hills of the shire
by creamer mc ream April 12, 2009
Get the mongo mug.
The action of using three outstretched fingers (most commonly the middle, ring and pinky finger)and sliding across the top of another individuals head and or hair in a hard forceful manor. Mongos are used to express hate towards a person or just to administer great pain or anguish to another being.
I hate that ar-tard so much I mongoed him and his fat head started to wimper
by Tom (redpill) October 16, 2007
Get the mongo mug.
(VERB).
Describing the act of going hard as a mother fucker at any activity.
"I'm about to go mongo on this buffet."
by Scoish Velociraptor Maloish December 1, 2017
Get the Mongo mug.
A failed attempt at a mono or manual while riding a bmx. Usually results in the rider going over backwards.
John: So Katrina, have you learnt any tricks on your new bmx?
Katrina: Well I've aced the mongo.
by Brever July 11, 2010
Get the Mongo mug.