Explanation: Get axed means losing your job, being dismissed.

Example: Betty and two of her friends got axed today.

Explanation: Get back means to return to a place or to return something.

Example: John will get back from Italy on Monday.

Explanation: Get back to someone means contacting them later with an answer.

Example: Let me find out and get back to you.

Explanation: Get behind with means failing to do things on time.

Example: We are getting behind in our last project.

Explanation: Get better means improving, usually health or situations.

Example: After the cease-fire, the situation got better.

Explanation: Get by means surviving or managing with limited resources.

Example: It is hard for me to get by on such a low income.

Explanation: Get down to business means focusing on the important task.

Example: Joan wanted us to stop laughing and get down to business.

Explanation: Get in means to arrive (train/plane) or to enter a small vehicle.

Example: What time does your train get in?

Explanation: Get in shape means improving physical condition.

Example: Most people get in shape by exercising and eating healthy foods.

Explanation: Get in touch with means reaching or communicating with someone.

Example: I need to get in touch with Mr. Willy as soon as possible.

Explanation: Get off means leaving a place or vehicle, or leaving work with permission.

Example: If we can get off by seven, the roads will be clearer. 

Explanation: Get off the hook means escaping blame or duty.

Example: I will get you off the hook if you tell the truth.

Explanation: Get on with means continuing with a task.

Example: The teacher asked the pupils to get on with some work quietly.

Explanation: Get on one’s horse means get ready to leave (informal).

Example: It’s time to get on my horse and get out of here.

Explanation: Get on someone’s nerves means irritating them badly.

Example: That car alarm is getting on my nerves.

Explanation: Get on (something) means entering public transport.

Example: I think we got on the wrong bus.

Explanation: Get one’s hands on means to acquire or obtain.
Example: I would like to get my hands on a rifle like that.

Explanation: Get out means leaving a place, or escaping, or for information to become known.

Example: When did he get out of jail?

Explanation: Get out of hand means becoming too difficult to manage.

Example: Be careful or that job will get out of hand.

Explanation: Get over means to recover from illness, shock, or difficulty.

Example: I need to get over my problems.