1. Bug off

Meaning: Go away.

Example: I told her to bug off because she was staring at me continuously.

2. Bug out.

Meaning: Open your eyes widely in surprise/leave for somewhere in a hurry.

Example: He bugged out when she turned up/ They bugged out when the police arrived.

3. Raining cats and dogs

Meaning: you can say “it’s raining cats and dogs” if it’s raining very hard.

Example: I could not go my office in yesterday because it was raining cats and dogs.

4. Keep up with.

Meaning: Stay up to date.

Example: It’s hard to keep up with all the latest improvements and breakthroughs in technology nowadays.

5. key down.

Meaning: relax, unwind.

Example: I need to key down before I go enter into the exam hall.

6. Key in.

Meaning: Enter numbers or information into a computer electronic system.

Example: It took all day to key in all the information into the database.

7. Keep off the mark.

Meaning: If you are quick of the mark, you are quick to react to an event or an opportunity.

Example: I was quick off the mark in the class yesterday when teacher asked the questions to me an I answered his questions very quickly in the class.