Top Definition
An intergalactic, carnivorous dinousaur composed solely of giant black dildos.
Sally: "mommy, daddy, there's a Gleamasaurus Rex in my closet and its really bugging me.
Mother: "I had one of those when I was ur age (said while biting bottom lip.)"
by Espar May 22, 2009
4 Words related to Gleamasaurus Rex

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