| Abbreviation | Definition |
|---|---|
| USMC | You Sure Mom Cares? |
| UT | Undertale |
| UT | Utterly Tyranical |
| UTA | Ultimate Tight A** |
| UTAS | Up The A** Syndrome |
| UTB | Unleash The Brilliance |
| UTB | Up The Boro |
| UTC | Up The Creek |
| UTF | Unable To Forward |
| UTFG | Use The Freaking Google |
| UTFM | Understand The Freaking Manual |
| UTFS | Use The Freaking Search |
| UTFW | Use The Freaking Wikipedia |
| UTM | U The Man! |
| UTQ | Unable To Quote |
| UTW | Under The Weather |
| UW | Uh, What |
| UW | Unwinding |
| UYD | Uhh, Yeah Dude |
| UYD | Use Your own Domain |