NASA
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| UBI | Unexplained Beer Injury | - | NASA |
| UDI | Unidentified Drinking Injury | - | NASA |
| UFO | Unidentified Frozen Object: Unidentified Dead Homeless Person In The Winter | - | NASA |
| UGLI | Ugly: A Patient (usually A Child) Who Looks A Bit Odd But Has Nothing Wrong With Them | - | NASA |
| ULPP | Unlicensed Pharmaceutical Provider (drug Dealer) | - | NASA |
| UNIVAC | Unusually Nasty Infection, Vultures Are Circling | - | NASA |
| UPF | Un-Passed Fart (gaseous Distended Abdomen) | - | NASA |