| Acronym | Definition |
|---|
| JB | Just Because (various organizations) |
| JB | Jonas Brothers (band) |
| JB | James Brown |
| JB | Journal of Bacteriology |
| JB | Johor Bahru |
| JB | Jornal do Brasil |
| JB | James Bond |
| JB | Job Board |
| JB | Jack Black (actor) |
| JB | Justin Bieber (musician) |
| JB | James Blunt (musician) |
| JB | Jailbreak (gaming) |
| JB | Jelly Belly |
| JB | Jim Beam (whiskey) |
| JB | Journal of Biochemistry |
| JB | Junction Box |
| JB | Jelly Beans |
| JB | Jersey Boys |
| JB | Jim Brown (NFL runningback) |
| JB | Jingle Bells (song) |
| JB | Jenson Button (F1 driver) |
| JB | Jack Bauer ('24' TV show character) |
| JB | Jacob Black (Twilight series character) |
| JB | jetBlue Airways |
| JB | Jerusalem Bible |
| JB | Jeb Bush (Florida Governor) |
| JB | Jump If Below (assembly language) |
| JB | Jimmy Buffet |
| JB | Jungle Brothers (band) |
| JB | Johannes Brahms (classical composer) |
| JB | Jollibee (Filipino fast food restaurant chain) |
| JB | Jello Biafra (Dead Kennedys band member) |
| JB | Johnny Bravo (cartoon show) |
| JB | John Burroughs (Middle and High Schools, Los Angeles, CA) |
| JB | Juice Box (various products) |
| JB | Jerome Bettis (football player) |
| JB | Japanese Beetle |
| JB | Jail Bait |
| JB | Jyske Bank (Bank of Jutland, Denmark) |
| JB | Juridische Bibliotheek |
| JB | Jim Boeheim (basketball coach) |
| JB | Jarque-Bera (statistics) |
| JB | Jerky Boys (movie) |
| JB | Joe Boxer |
| JB | Joseph-Beth (bookstore chain) |
| JB | Jura Bernois (region in Switzerland) |
| JB | Joint Army-Navy Board (US DoD) |
| JB | Jonathan Bender (NBA player) |
| JB | Jail Birds |
| JB | Jonny Bravo |
| JB | Justerini & Brooks(Whiskey) |
| JB | Job Books |
| JB | Junctional Bradycardia |
| JB | Johann Bach (baroque composer) |
| JB | JavaBoard |
| JB | Joyful Being (social group; Georgia) |