What is Uuu?
1.
Uranus Uterus Underwear. A type of underwear that covers both your butt and your uterus.
Uruguay Underground Union. Communist Worker's Union for Subway workers in Uruguay.
1 - Make sure you pick me another pair of UUU's. Mine are dirty.
2 - The UUU is on strike again.
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Spending all of your time on Urban Dictionary when you should be doing something else (such as writing a paper, studying for an exam, pr..