- blink
- blinker
- blitz
- blitzkrieg
- block
- blow-out
- blue-book
- bobby-sox
- bobby-soxer
- boloney
- bombardier
- bone
- boob
- booby hatch
- bookstore
- boom
- boomster
- boot
- boot camp
- booth
- border
- borough
- bottle
- bounce
- bouncer
- bound
- bouquet
- bourbon
- bowery
- bowie-knife
- box-car
- blow
- blow-up
- blowhard
- blown
- blunderbuss
- boa
- board
- boarder
- bobby-socks
- body-snatcher
- bohunk
- boiler
- bolt
- bolter
- bomb-shell
- bombshell
- bookmobile
- bootback
- bootleg
- bop
- bordello
- bosom
- boss
- bossism
- boy
- bracket
- braggadocio
- brahmin
- brain-storm
- brains trust
- brakesman
- brash
- bread-line
- brig
- britisher
- broadcloth
- broadjump
- brownie
- bub
- brownstone
- bruit
- brush
- buck
- buddy
- bug-eyed
- bulldozer
- bullet-head
- bulrush
- bulldose
- bullet-headed
- bum
- bunch
- bureau
- bureaux
- burlesque
- burro
- bus boy
- bushel
- busheller
- broad
- broad gauge
- broadside
- brotherhood
- brush-off
- bracer
- brag
- brahman
- brainstorm
- brakeman