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1.
A munta (ugly female) who is also incredibly large and monstrous the style of a dinosaur
That girl by the bar is a real muntasaurus. She looks like something from the prehistoric era. I’m sure she probably has a lovely personality though.
by Fat Archeologist December 27, 2009
 
2.
A fat, ugly female, or munta, who also has the characteristics of a dinosaur, e.g. terrifying, dominant, almost reptilian, gigantic and dangerous
Check out that muntasaurus at the bar, she'll tear your face off with razor teeth
by The Fossil Munta-Hunter August 23, 2010