1 definition by fazza11

Top Definition
Someone that is not right in the head, Very dopey or even someone that has been on drugs that have fucked up there mind.
Example of a mong:
ME: You know I saw your dog fucking your mother today.
MONG: OMFGz0r where I will kill that fucker
ME: Wow your a mong!
MONG: What?
ME: Exactly
by fazza11 March 30, 2010

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