| bang up |
| banker's dozen |
| bankers' hours |
| bank night |
| bankrupt cart |
| banner year |
| banyan day |
| barber's sign |
| bare-bones |
| bare one's soul |
| bare one's teeth |
| bare poles |
| barhop |
| bark up the wrong tree |
| barnburner |
| barn find |
| bar none |
| barrel of laughs |
| barrel of monkeys |
| bar sinister |
| bar star |
| basement battler |
| base over apex |
| bash into shape |
| bash someone's face in |
| bash someone's head |
| bash the bishop |
| basket house |
| bask in the sunshine |
| bass-ackwards |
| bastardly gullion |
| bat an eyelid |
| bat a thousand |
| bate an ace |
| bat five hundred |
| bat for the other team |
| bathroom singer |
| bat of an eye |
| bat one's eyes |
| Bat-Signal |
| batten down the hatches |
| bat the breeze |
| bawl one's eyes out |
| bawl out |
| be aces with |
| be a hundred years too early |
| be-all and end-all |
| be a man |
| bean counter |
| bear a hand |
| bear away the bell |
| beard the lion in his den |
| bear fruit |
| bear in mind |
| bear oneself |
| be around |
| bear the brunt |
| bear up |
| bear with |
| beast with two backs |
| beat a dead horse |
| beat a retreat |
| beat around the bush |
| beat as one |
| beat Banaghan |
| beat feet |
| be a thing |
| beat it |
| beat off |
| beat off with a stick |
| beat one's brain |
| beat one's swords into ploughshares |
| beat one's swords into plowshares |
| beats me |
| beat someone round the ears |
| beat someone's arse |
| beat someone's ass |
| beat someone's brains out |
| beat the bishop |
| beat the bushes |
| beat the clock |
| beat the cock |
| beat the crowd |
| beat the daylights out of |
| beat the drum for |
| beat the dust |
| beat the odds |
| beat the pants off |
| be at the plague |
| beat the poop out of |
| beat the shit out of |
| beat the stuffing out of |
| beat to the punch |
| beat with the ugly stick |
| beautiful people |
| beauty queen |
| beauty sleep |
| beaver away |
| become of |
| become one flesh |