What does UO mean?
Ultima Online (game)
Other definitions of UO:
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How to use the term UO:
There are no example uses of UO at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
First-Person Shooter (video game term)
High quality marijuana extract. It's clear like sugar candy, and shatters like glass.
Can You Pick-Up on This