A
A
a (an)
a back-seat driver
a bad lot
a bad smell
a bag/ bundle of nerves
a bald head
a baptism of fire
a barber-shop quartet
a barrage of gunfire
a barren fruit
a barren woman
a big cheese
a big fish
a big name
a big noise
a big shot
a can of worms
a change of heart
a clean sheet/slate