| Abbreviation | Definition |
|---|---|
| JAN | Just A Nurse |
| JANET | Just Another Non-Existant Terminal |
| JAP | Jedi Academy Padawan |
| JAP | Just Another Peabrain |
| JAP | Justifiable Asian Pedophiles |
| JAPAN | Jam And Press At Night |
| JAPAN | Jumping And Pumping All Night |
| JAPAN | Just Always Pray At Night |
| JAQ | Jamie Asked Questions |
| JAQ | Just Another Queer |
| JARGON | Junky Acronymic Recondite Grandiose Overblown Names |
| JAS | Java Alphabet Soup |
| JAS | Joan of Arc Society |
| JASHER | Jake And Samy Hate Eat Rice |
| JASON | Juicy A** Sarcastic Onion Network |
| JAT | Joke About Time |
| JAVA | Just Another Vague Acronym |
| JAVA | Just Another Valueless Acronym |
| JAVA | Just Another Very Advanced |
| JAVA | Just Another Victim Again |