Hit the sack
This means to go to bed. I am so tired. I think I’ll hit the sack.
Barking up the wrong tree
To make the wrong choice. To make a wrong assumption about someone. If he expects to borrow my bike, he is barking up the wrong tree.
Piece of cake
A very easy task. I was worried about the test today, but it was a piece of cake.
Fly on the Wall
You would like to see or hear something that doesn’t involve you. I’d love to be a fly on the wall to hear their conversation.
Straight from the horse’s mouth
To hear something from the person who has direct personal knowledge of it. I heard it straight from the horse’s mouth.
It’s not rocket science
It’s not rocket science. You do not think something is difficult to do. You can fix your bike. It’s not rocket science!
You agree with someone or give something your approval. Critics gave the movie a thumbs up.
Apple of my eye
Someone highly cherished by you. You are the apple of my eye.
Once in a Blue Moon
Something extremely rare. He comes around once in a blue moon.
At the drop of a hat
To do immediately, without delay. He is ready to go at the drop of a hat.
Under the weather
This is used when you are not feeling well. Scott was feeling under the weather, so he took the day off.
A penny for your thoughts
A phrase used to ask someone what they are thinking about. I’ll give you a penny for your thoughts.
Ball is in your court
It is up to you to make the next decision. I’ve done everything I can to help, now the ball is in your court.
Raining cats and dogs
A very heavy rainstorm. It’s raining cats and dogs!
When pigs fly
Something unlikely to happen. I’m sure you will clean your room when pigs fly!
An Arm and a Leg
A large amount of money. Very expensive. This new car cost me an arm and a leg.