| Abbreviation | Definition |
|---|---|
| JSPS | Just Some Poor Schmuck |
| JST | Jewish Standards Time |
| JSW | Jet Set Willy |
| JT | Just Toy |
| JT | Justin Thyme |
| JTMYVA | Joey The Muggle Yucking Vile Alopecia |
| JTNDTS | Just Threw Nan Down The Stairs |
| juanEata | Italian American Slanguage |
| JUG | Jalopy Undisputedly Geriatric |
| JUICE | Join Us In Creating Evil |
| JUICE | Jupiter Icy Moons Explorer |
| JULIA | Julias United Loyal Internet Alliance |
| JUMP | Java Users Must Pay |
| JUMP | Jesus Unleash My Potential |
| JUNE | Just, You but, Not, Everyone |
| JV | Jugs Varsity |
| JV | Just Victories |
| JVC | Jaluo Very Complicated |
| JVC | Junk Video Cameras |
| JVC | Junk Video Corporation |