Let the cat out of the bag- Amber was wanting to keep the party a secret, but Travis let the cat out of the bag.

Take a catnap- Michelle feels exhausted and decides to take a catnap before dinner.

The last straw- Jane's waited forget to bring her soda. Then he mixed up her dinner order. The last straw was when he dropped her dessert on the floor.

Break a leg- Marcus was about to step out on stage for the opening night of his performance. Jasmine said, "You'll do great. Break a leg!"

Don't count your chickens before they hatch- Mark never practices, but he still thinks he will make the basketball team easily. His friend tells him, "don't count your chickens before they hatch."

Best thing since sliced bread- Lincoln bought a new phone. He thought it was the best thing since sliced bread.

Seeing eye to eye- my best friend and I were seeing eye to eye on what we wanted to lunch. We both ordered hamburgers!

Skating on thin ice- Carmen has been late for class three times. If it happens once more, she will be suspended. Carmen is skating on thin ice!

In the heat of the moment- Andrew and his brother were having an argument. In the heat of the moment, Andrew slammed the door as he left the room.

Dropping like flies- Because the spelling bee was so difficult, the students were dropping like flies. In less than an hour, there were only five students left competing.

Roll the dice- Paula isn't sure if she should try to play the clarinet in the band this year. She thinks it will be fun, but she doesn't want to fail. She decides to roll the dice and see how it goes.

Go fly a kite- Jason was tapping his pencil against the table. He noticed that it was annoying Amy, so he kept doing it. Amy told him to go fly a kite.