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1.
A combination of "Mong", (meaning a total idiot) and "Retard". General useage as an insult.
1) You're a total mongtard!
2) What a mongtard!
by SpasmicPuppy January 19, 2004
 
2.
Derived from "Mongoloid" meaning one who suffers from Downs Syndrome and "Retard" a term given to either slow learners or just general morons, this word is used as an insult to people who do something spasticated.
"John you managed to set fire to your own fireproof boxers you mongtard!"
by CuddyRules May 16, 2005