Boot out (someone) or boot (someone) out
To expel someone, to get rid of someone. My son was booted out of high school for seriously bullying one of his classmates.
Book (someone)
To register someone as a suspect for a crime The Greek police booked the eight escaped men for the accidental murder of the young girl in... Read more →
Book a hotel/flight/room
To reserve a hotel/flight/room in advance. We booked a room for our holiday. I plan to book a flight this weekend.
Bone up (on something)
To study or review (something). On July 15 I'm going to take grammar lessons to bone up on my English.
Bone of contention
A reason for a quarrel, the subject of a fight. The house by the sea was a major bone of contention after their father died.
Bolt down (something) or bolt (something) down
To eat something very quickly. The man bolted down his food before going back to work.
Boil down to (something)
To reduce something to its essential or main part. The reason that we could not go on a holiday boiled down to the fact that we had no money.
Boggle (someone’s) mind
To confuse or overwhelm someone. The amount of waste in the city program really boggles my mind.
Bog down
To slow down and make no progress, to become stuck (a bog is an area of land that is wet and muddy - like a swamp). After I realized how busy I... Read more →
Board a plane
To enter a plane. As a result of an unexpected problem, the passengers boarded the plane late.