| Abbreviation | Definition |
|---|---|
| JB | Jessica's Bunny |
| JB | Jessie Beatrice |
| JB | JetBoy |
| JB | Jim's Brother |
| JB | John Bentley |
| JB | John Bill |
| JB | John Boy |
| JB | John Boynton |
| JB | Johnny Boring |
| JB | Jungle Boy |
| JB | Junior Boy |
| JB | Justin Beiber |
| JBL | James B Lansing |
| JBT | Jack Booted Thug |
| JC | Jack Christopher |
| JC | James Carl |
| JC | James Cash (Penny) |
| JC | James Charles |
| JC | Jami Carroll |
| JC | Jamie Christine |