| Abbreviation | Definition |
|---|---|
| UDEMY | Academy for you |
| UDEMY | You Do Everything Mostly Yourself |
| UDM | U Da Man |
| UDM | U Don't Mind |
| UDN | U Da Nut! |
| UDP | Usenet Death Penalty |
| UDW | U Da Worst! |
| UDX | U de eXpert! |
| UDY | U Dumm Yokel! |
| UE | User Experience |
| UEI | Unresolved Emotional Issue |
| UF | Uh Forget it |
| UFB | UnF***ing Believable |
| UFD | Until Flames Die |
| UFF | Ugly F*** Face |
| UFO | Unidentified F***ing Object |
| UFR | Un F***ing Real |
| UG | Unicorn Girl |
| UG2BK | You've Got To Be Kidding |
| UGB | U Gotta Be .... |