A very large, loose vagina resembling the man-eating flower on Mario games, Plentiful among older looking women.
Ew, I bet that 60 year old lesbian gym coach has a vagisaurus.
by Tardified July 30, 2010
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Someone who is being a real big pussy.
Dude, stop being a vagisaurus rex.
by jorge10886 January 26, 2006
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