10 English Expressions

Piece of Cake: It means that something is easy or simple. 

Costs an arm and a leg: An expression to say that something is expensive or costly or difficult to achieve.

Break a leg: to wish good luck to another person.

Let the cat out of the bag: It means tell a secret.

Hit the nail on the head: When you have matched or say exactly what the person wanted to say.

When pigs fly: Used to express disbelief.

You can’t judge a book by its cover: don't judge people by their physical appearance.

Bite off more than you can chew: It refers to when we try to do too many things at the same time and have just stressed.

Scratch someone’s back: To help another person.

See eye to eye: Say to explain whether or not someone is on the same wavelength as us.