Idioms/K

If you get a kick in the teeth, something bad happens to you or you feel that you've been treated poorly.

If someone is a knight in shining armour, they help you when you are in a difficult situation.

If you give someone a knuckle sandwich, you punch them.

If you keep a low profile, you try not to do anything that will draw attention to you or create interest in you.

If you keep abreast of something, you always know about the latest news and developments in relation to it.

If you keep an eye on someone, you make sure you know what they're doing.

If someone tells you a secret and you keep it under your hat, you don't tell anyone.

If you keep something at bay, you stop something that could be a problem for you from getting too close or from getting worse.

If you keep something in mind, you remember some information or advice and consider it at some time in the future.

If you keep track of something or someone, you continue to know what's happening with them.

People who try to keep up with the Joneses are people who feel it's important to show that they're as successful as others (such as their rich neighbours, "The Joneses").

If you keep your nose clean, you stay out of trouble by making sure you don't do anything wrong.

If you keep your word, you do what you promised to do.

If someone kicks the bucket, they die.

If you kick the habit, you manage to stop doing something that has become a bad habit.

If you kill the goose that lays the golden egg, you destroy something that has made you a lot of money.

You kill time when you do something to amuse yourself while waiting for something.

If you kill two birds with one stone, you achieve two things with the one action.

If you kiss and make up with someone, you get over a disagreement and become friendly again.

You can say "Knock it off!" when someone is doing something wrong, or something that's annoying you, and you want them to stop it.

If something knocks your socks off, it amazes you and surprises you.

If you know the ropes, you know how to do a job properly, or you know how things work and how to get things done.

If you know what's what, you have a lot of experience and you understand things well.

If you know where you stand, you know exactly where you fit in a social or work situation, or in someone's life.

If you know your stuff, you're very good at what you do, and you know a lot about it.