“Butter someone up”

“Throw someone under the bus”

To sacrifice someone else to protect yourself.

“Brush up on something”

To improve knowledge or skill by reviewing it.

“Shape up or ship out”

Improve your behavior or leave.

“Keep your chin up”

Stay positive in a difficult situation.

“Drive someone up the wall”

To make someone very annoyed or angry.

“Up in arms”

Very angry or upset about something.

“Keep someone at arm’s length”

To avoid becoming too close to someone.

“Cut someone some slack”

To be less critical of someone.