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1.
One who rapes the anus of another person, a pillager of butts; someone who takes assholes by force.
Mitch: Poo pusher!

Aaron: Shut up, you Ass Mongol.
by Khazpar August 18, 2008
 
2.
Used to describe a barbarian who raids the asses of others, men, women or children.
The horde of Ass Mongols came in and brutally raped the buttox of each person.
by Batman's Cousin April 05, 2007
 
3.
One who likes to screw other men. Can be used on anybody gay or straight.
Jimmy is an ass mongol
by Tyler February 16, 2005