| act up |
to behave in a bad or mischievous way; misbehave. [2 definitions] |
| add up |
to bring one to a logical conclusion; to make sense. |
| add up to |
reach (a certain total). |
| back up |
to create and store a copy of (a computer file), often in a separate location, in case the original is damaged or lost. [8 definitions] |
| bang up |
to damage or injure, as in a collision. |
| bang-up |
(informal) done very well; excellent. |
| bark up the wrong tree |
to direct one's attention, efforts, request, or accusation to the wrong person or thing. |
| be up to |
to be the choice or responsibility of (someone or something); depend on. |
| bear up |
to work through something difficult without giving up; endure. |
| beat up |
to hit or kick (someone) until seriously injured. [2 definitions] |
| beat-up |
(informal) in poor or damaged condition because of age or hard use; in disrepair; shabby. |
| beef up |
to add improvements to (something) to make it stronger or more efficient. |
| blow up |
to destroy or be destroyed through an explosion. [3 definitions] |
| boot up |
in computing, to start up (a computer or a program) by loading the operating system or installing the initial instructions. |
| bottle up |
to control or hold in; not express. |
| brace up |
to summon one's strength or courage. |
| break up |
to break (something) into pieces or sections. [10 definitions] |
| bring up |
to take care of (a child) until the child is an adult. [4 definitions] |
| brush up on |
to bring up to date or review. |
| buck up |
(informal) to cause to recover one's morale or courage. |