| Abbreviation | Definition |
|---|---|
| JAC | Junior Ale Can |
| JACOB | Jacob Always Carries Other Baggage |
| JACOB | Jacob Always Corrects Others' Bullshit! |
| JADE | Jamaican American Destinee Empress |
| JAG | Jugglers Against Gravity |
| JAG | Just Aging Gracefully |
| JAGUAR | Jumpy Apes Grab Underpants And Rip |
| JAGUAR | Jumpy As Grasshoppers, Use At Risk |
| JAGUAR | Just A Gaudy Useless American Ripoff |
| JAGUAR | Just A Good Used Automobile Really |
| JAGUAR | Just A Goofy Unreliable Asinine Rustbucket |
| JAGUAR | Just A Great Unbelievably Amazing Ride |
| JAI | Jaimie And I |
| JAINEYA | Justice Amazing Intelligent Nieve Energetic Youth Amazing |
| JAM | Jams Are Monster |
| JAM | Javagen Ant Modules |
| JAM | Jokes Aside Madam |
| JAM | Joy And Music |
| JAM | Just Another Mother |
| JAMS | Japanese Anime Manga Society |