| be cruel to be kind | | | |
| bed blocker | | | |
| beddy-bye | | | |
| bed in | | | |
| bed of roses | | | |
| be down with | | | |
| beef to the hoof | | | |
| bee in one's bonnet | | | |
| been there, done that | | | |
| been there, done that, bought the T-shirt | | | |
| been there, done that, got the T-shirt | | | |
| been to the rodeo | | | |
| beer and skittles | | | |
| beer goggles | | | |
| beer muscles | | | |
| beestung | | | |
| before it was cool | | | |
| before someone's time | | | |
| before you can say knife | | | |
| beg for one's life | | | |
| beggars can't be choosers | | | |
| beg off | | | |
| beg to differ | | | |
| behind bars | | | |
| behind closed doors | | | |
| behind its time | | | |
| behind someone's back | | | |
| behind the bit | | | |
| behind the counter | | | |
| behind the eight-ball | | | |
| behind the scenes | | | |
| behind the times | | | |
| behind time | | | |
| be in and out | | | |
| be in for | | | |
| be in luck | | | |
| be it as it may | | | |
| be left at the post | | | |
| be left holding the baby | | | |
| belemnite battlefield | | | |
| believe it or not | | | |
| believe one's ears | | | |
| believe one's eyes | | | |
| believe you me | | | |
| believing is seeing | | | |
| be like | | | |
| bell out | | | |
| bells and whistles | | | |
| bell the cat | | | |
| bellwether state | | | |
| belly up | | | |
| belly up to the bar | | | |
| below par | | | |
| below the belt | | | |
| below the mahogany | | | |
| below the salt | | | |
| be mother | | | |
| be my guest | | | |
| bench jockey | | | |
| bend one's elbow | | | |
| bend over backwards | | | |
| bend someone's ear | | | |
| bend someone's will | | | |
| bend the brain | | | |
| bend the knee | | | |
| bend the truth | | | |
| bend to one's will | | | |
| bend to someone's will | | | |
| beneath the surface | | | |
| benevolent overlord | | | |
| Benjamin Button | | | |
| be no match for | | | |
| bent on | | | |
| bent on a splice | | | |
| be oneself | | | |
| be one's own man | | | |
| be one's own worst enemy | | | |
| be on to | | | |
| be out for | | | |
| beside oneself | | | |
| beside the point | | | |
| be someone's to lose | | | |
| best bet | | | |
| be still my heart | | | |
| best-kept secret | | | |
| best laid plans | | | |
| best of both worlds | | | |
| best of the bunch | | | |
| best pleased | | | |
| best regards | | | |
| best thing since sliced bread | | | |
| best thing since sliced pan | | | |
| be taken ill | | | |
| be that as it may | | | |
| be the bigger man | | | |
| be there | | | |
| bet one's boots | | | |
| bet one's bottom dollar | | | |
| betray with a kiss | | | |
| better angels | | | |