Uo

When a person mistypes “up” on a phone.

Guy 1 on phone: Have you watched Uo recently?
Guy 2 on phone: did you say Up?
Guy 2: SHIT

by ion0320 November 2, 2018

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Get the Uomug.

Uo

Someone who is cool as fuuuuck. Nice genderless name

Hey have you seen Uo?
Yeah, I just saw them in the libary

by Uoiscool August 28, 2021

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uos

Unless Otherwise Specified.
That is, a qualifier used to indicate that all members of a group have a given quality, excepting those which are explicated to NOT demonstrate said quality.

All images on this website copyright bidensandwich.com uos.

List of common dosages (all units in milligrams uos):
Ibuprofen: 400
Acetaminophen: 600
LSD: 50 micrograms
Aspirin: 320
Insulin: .15mL

by RunningFool July 16, 2011

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Get the uosmug.

Pro UO

Refers to those in the game Ultima Online.

People who devote ample amounts of time to improve their skill in the game, and take it seriously than most others.

We just got owned again. Those guys are Pro UO.

by Blot May 8, 2007

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A term used to signify that something is Unofficial — not formally recognized, approved, or confirmed. Often used in texting, online forums, leaks, or fan communities to label content, events, or information that hasn’t been verified or officially released.

Ludwig: Hey chat I followed this moistcr1tikal Instagram page
Chat: Bro it literally says UO in the bio, that’s not an official account
Ludwig: UO doesn’t stand for Unofficial wdym
Chat: “English major”

by Words Words June 4, 2025

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