Top Definition
A guineasaurus rex is an off the boat italian american, or a guido. They usually have sex promiscuously with multiple partners in college. They enjoy saying things like "fucking skanks" and "Jaeger Bombs!" while pointing around the room.
Mike is a huge guineasaurus rex, no matter what you say.
by Cal Hacker March 03, 2009
5 Words related to Guineasaurus Rex

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