AMERICAN IDIOMS K

To lay low. To not attract attention to oneself by talking loudly, dressing in flashy clothes, causing trouble, etc. ex. "The bank robbers knew that they had to keep a low profile until they crossed the border."

To watch. To pay attention to. ex. "I have to go to the store. Can you please keep an eye on the baby for 10 minutes?"

To force oneself not to laugh, even though one wants to. ex. "He was saying the stupidest things, and I was finding it hard to keep a straight face."

To remain calm.

To uphold one's promise. ex. "He's a very honorable person who always keeps his word."

To keep someone informed.

To not allow someone to sleep. ex. "The neighbors' party kept me up all night."

To not let others know about something. To not reveal something. ex. "Hey, don't tell anyone about your time in prison. Keep it to yourself."

To maintain a record of. ex. "I don't know where all my money goes. It's hard to keep track of my expenses."

Someone who is in a relationship where the other person pays for everything. ex. "Stephen's girlfriend always pays for everything. He's such a kept man."

To relax.

To regret.

To waste time.

Stop it!

A phrase said to cancel out (imaginary) bad luck.

To know something completely and thoroughly. ex. "Let me show you around - I know this neighborhood inside-out."

To know the facts. To know how things go.

A person who acts like they know everything. ex. "Robert is so conceited! Yeah, he's a real know-it-all."