A uterus that has the ability to rip through anything, including emotions and happiness. The Uterusaurus is not from the Jurassic era, nor is it a mythical creature. It lives deep within every normal Uterus waiting for the most inopportune moment to strike.
My girlfriend and I made plans to go out tonight, and I was totally going to get some, but her Uterusaurus arose from the pits of hell and cock-blocked me. I ended up having to bring her ice cream and cuddle.
by woodymanp April 08, 2010

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