| u | You | 552
|
| U mad bro | Are you mad? | 584
|
| u-ok | You OK? | 597
|
| u/l | Upload | 600
|
| U2 | You too | 592
|
| U2U | Up to you | 595
|
| Uber | The best | 580
|
| UCE | Unsolicited commercial email | 601
|
| UDFI | You don't fit in | 598
|
| Uff da | Expression of dismay, surprise, or relief | 599
|
| UG2BK | You've got to be kidding | 602
|
| Uggo | Ugly | 598
|
| ugh | Disappointed | 584
|
| Ugly cry | To sob unattractively | 599
|
| Ugly hot | Physically attractive despite some ugly features | 595
|
| Ugly sleep | Deep sleep | 595
|
| UI | User Interface | 598
|
| UKWIS | You know what I'm saying | 601
|
| ul | Upload | 585
|
| ul | Unlucky | 598
|
| ULKGR8 | You look great | 600
|
| ULPP | Unluckiest person on the planet | 586
|
| ult | Ultimate ability | 572
|
| UNADR | You need a doctor | 596
|
| Unalive | To kill | 597
|
| Uncanny Valley | The point where human-like robots appear creepy to humans | 598
|
| Uncle Charlie | Curve ball | 600
|
| uncrtn | Uncertain | 600
|
| Understood the assignment | Did an amazing job | 601
|
| Undies | Underwear | 599
|
| Undroppable | A player who cannot be dropped from a fantasy team | 595
|
| Unforced error | An easily-avoidable mistake | 597
|
| Unforch | Unfortunately | 599
|
| Unfriend | To remove a friend on Facebook | 593
|
| Unicorn | A uniquely perfect person | 596
|
| Unicorn | Rare LuLaRoe item | 596
|
| Unicorn mom | An imperfect, authentic mom who defies mom shaming | 591
|
| Uninstall | Quit | 599
|
| Unkeyboardinated | Uncoordinated with a keyboard | 596
|
| Unlightening | Giving information that makes a person dumber | 597
|
| uno | You know | 598
|
| Unspoken rizz | Nonverbal charm | 594
|
| Unstan | A person who is trying to be less obsessed with a celebrity | 598
|
| Unsub | Unidentified subject | 599
|
| Unsub | Unsubscribe | 597
|
| uok | You OK? | 599
|
| UOME | You owe me | 598
|
| up | Underpowered | 599
|
| Up north | Anywhere north of your location | 599
|
| Up to eleven | Up to an excessive degree | 597
|
| UPF | Ultra passionate fan | 598
|
| Ups | Jumping ability | 595
|
| UR | Unearned runs | 600
|
| UR | You are | 597
|
| UR | Your | 583
|
| UR2M | You are too much | 598
|
| ura | You're a | 600
|
| URA* | You are a star | 600
|
| URAB | You are a b**** | 600
|
| URAL | You are a loser | 600
|
| uraqt | You are a cutie | 593
|
| Urbex | Urban exploration | 597
|
| URC | You are caught | 600
|
| ure | You are | 599
|
| urgr8 | You are great | 598
|
| URI | Uniform Resource Identifier | 599
|
| URL | Uniform Resource Locator | 595
|
| URN | Uniform Resource Name | 596
|
| Urp | Vomit | 599
|
| urs4e | Yours forever | 599
|
| URSKTM | You are so kind to me | 600
|
| URTB | You are the best | 600
|
| URTM | You are the man | 600
|
| urw | You're welcome | 600
|
| us | Ultrasound | 600
|
| USA | Until sides ache | 598
|
| USA | United States of America | 582
|
| USAD | You're such a dork | 598
|
| USB | You sexy b**** | 597
|
| USD | United States dollars | 597
|
| USFDA | United States Food and Drug Administration | 600
|
| USMNT | United States Men's National Team | 599
|
| Ussie | A picture a person takes of themself and someone else | 599
|
| USWNT | United States Women's National Team | 597
|
| UT | You there? | 600
|
| UT2L | You take too long | 599
|
| UTFL | Use the force, Luke | 600
|
| UTG | Under the gun | 597
|
| uttp | UTubeTrollPolice | 594
|
| UW | You're welcome | 602
|
| UX | User Interface | 597
|
| UY | Up yours | 581
|