| Abbreviation | Definition |
|---|---|
| USMC | Unconstitutional Slavery Made Constitutional |
| USMC | Urine Samples Make Civilians |
| USMG | United States Marine Grunts |
| USMNT | United States Mutant Ninja Turtles |
| USMZ | United in Support of Michael Zaslow |
| USP | Ultimate Spider Paradise |
| USP | Under Super Poop |
| USS | The United States Of Saturn |
| USS | United Solar Systems |
| USS | United States Spy |
| USSR | Under Sorrowful Supervision Relationship |
| USSR | Underground Society Of Secret Rhythm |
| USSR | United Soviet Suicide Republican |
| UST | Untouchable Sick Tekneekz |
| USW | Utterly Stupid Worthless |
| UT | Under Tipping |
| UT | Undisciplined Trash |
| UT | University of Thugs |
| UTB | Under The Bra |
| UTP | Up The Pooper |