| B | SMS/Chat: Blink, Blinker, Back |
| B/R | SMS/Chat: Best regards |
| B4 | SMS/Chat: Before |
| B4N | SMS/Chat: Bye for now |
| ba | Internet: Landekode for Bosnien-Herzegovina (ISO 3166 Code lists) |
| bb | Internet: Landekode for Barbados (ISO 3166 Code lists) |
| BBL | SMS/Chat: Be back later |
| BBN | SMS/Chat: Bye bye now |
| BBS | SMS/Chat: Be back soon |
| BC | SMS/Chat: Because |
| bd | Internet: Landekode for Bangladesh (ISO 3166 Code lists) |
| be | Internet: Landekode for Belgien (ISO 3166 Code lists) |
| benauet | Gammel stavemåde for benovet. |
| bf | Internet: Landekode for Burkina Faso (ISO 3166 Code lists) |
| BF | SMS/Chat: Blinker frækt, Best friend, Boy friend |
| BFN | SMS/Chat: Bye for now |
| bg | Internet: Landekode for Bulgarien (ISO 3166 Code lists) |
| BG | SMS/Chat: Big grin |
| bh | Internet: Landekode for Bahrain (ISO 3166 Code lists) |
| BHSAG | SMS/Chat: Bryder hulkende sammen af grin |
| BHØVR | SMS/Chat: Behøver |
| BHØVS | SMS/Chat: Behøver |
| bi | Internet: Landekode for Burundi (ISO 3166 Code lists) |
| bj | Internet: Landekode for Benin (ISO 3166 Code lists) |
| BJ | SMS/Chat: Bad joke |
| BL8 | SMS/Chat: Be late |
| black hat | Internet: Ulovlydige procedurer, f.eks. ved søgemaskineoptimering. Et udtryk taget fra stumfilmene, hvor heltene i westerns altid bar en hvid hat og skurkene altid bar sort hat. |
| blomst | Jagt: Harens hale |
| bm | Internet: Landekode for Bermuda (ISO 3166 Code lists) |
| BM | SMS/Chat: Bite Me |
| bn | Internet: Landekode for Brunei Darussalam (ISO 3166 Code lists) |
| bo | Internet: Landekode for Bolivia (ISO 3166 Code lists) |
| br | Internet: Landekode for Brasilien (ISO 3166 Code lists) |
| BRB | SMS/Chat: Be right back |
| BRGRDS | SMS/Chat: Best regards |
| bs | Internet: Landekode for Bahamas (ISO 3166 Code lists) |
| bt | Internet: Landekode for Bhutan (ISO 3166 Code lists) |
| BTW | SMS/Chat: By the way |
| BTYDER | SMS/Chat: Betyder |
| bv | Internet: Landekode for Bouvet Island (ISO 3166 Code lists) |
| bw | Internet: Landekode for Botswana (ISO 3166 Code lists) |
| by | Internet: Landekode for Hviderusland (ISO 3166 Code lists) |
| bz | Internet: Landekode for Belize (ISO 3166 Code lists) |