| Abbreviation | Definition |
|---|---|
| UTSL | Use The Source, Luke |
| UTST | Up The Shagging Town |
| UUOC | Useless Use Of Cat |
| UUS | Un- United States |
| UUU | Unofficial Ultimate Ultros |
| UUUMMMM | It means I just f***ed your mom last night, B*TCH!!!!! HAAAA GOTT HEM!!!! |
| UUUU | Underpowered Underarm Underjaculation of Ursula |
| UVA | United Vasectomy Applesauce |
| UVM | University of Vladimir |
| UWF | U Won't Finish |
| UWF | University For White Folks |
| UWM | University of Wanton Mediocrity |
| UXM | Uncanny X Men |
| UXN | Uncanny Xmen. Net |
| UYA | Up Your Arsenal |
| UYB | Up Your Bum |
| UYD | Usagi Yojimbo Dojo |
| UZA | United Zark Assassins |
| UZC | Urban Zen Cowgirl |
| UZI | Universal Zorkmid Index |