| Abbreviation | Definition |
|---|---|
| UPS | Useless Power Supply |
| UPS | Utter Parcel S*** |
| URAF | You aRe A Fagot |
| URD | Ultra Rush Demons |
| URK | Urk Requires Knowledge |
| URL | Ultra-Reliable Linkage |
| URL | Universal Republic of Love |
| URL | Unwrap Red Licorice |
| URL | User Really Lost |
| URL | Usually Rad Libbys |
| URL | You aRe Loco |
| URL | You Are Loser |
| URL | You Are The Lard |
| URPG | Unoriginal Role Play Game |
| URPS | Ultimate Rock Paper Scissors |
| USA | The United States Of Asia |
| USA | Ubanity Sagacity And Ardency |
| USA | U'll Save Alot |
| USA | Unable to Solve Addition |
| USA | Undefeated Southern Army |