To keep something secret
No one is supposed to know our plan. Please keep a lid on it.
To watch intently.
Please keep an eye on my children for me. I need to go to the store.
To be quiet; to not be noisy.
Please keep it down. I'm trying to study.
To work hard or focus heavily on work
You will do well if you keep your nose to the grindstone.
To stay positive and not lose confidence, even in difficult situations.
I know things are tough right now, but keep your chin up!
To relax.
After work tonight, I'm going to go home and kick back.
To die (informal and often humorous).
The old farmer finally kicked the bucket after living a long life.
To engage in playful joking or teasing.
Don't take Max seriously. He was just kidding around when he said that you were ugly.
to stop doing something.
Please knock it off. That really annoys me.