| Abbreviation | Definition |
|---|---|
| UOK | Are You OK? |
| UON | Unless Otherwise Noted |
| UR | You Are .... |
| UR | Your |
| URB | You Are Beautiful |
| USNG | Using |
| USO | Unless Stated Otherwise |
| UTA | Unable To Attend |
| UTD | United |
| UTH | Youth |
| UTL | Utility |
| UTM | U The Man! |
| UUA | Underage User Alert |
| UWMA | Until We Meet Again |
| VAM | Vamoose |
| VBG | Very Big Grin |
| VBW | Very Best Wishes |
| VCDA | Vaya Con Dios, Amigo |
| VGB | Very Good Boy |
| VGD | Very GooD |