Be a piece of cake.
Be very easy.
Bob said the test was difficult, but I thought it was a piece of cake."
Be all ear.
Be eager to hear what someone has to say.
A: "I just got an e-mail message from our old friend Sally."
B: "Tell me what she said. I'm all ears!"
Burn the midnight oil
Study/work all night or until very, very late at night.
"I'm not ready for the test tomorrow. I guess I'll have to burn the the midnight oil."
Idioms
Pay the piper.
Face the consequences for something you've done.
"I stayed up too late tonight. Tomorrow I'll have to pay the piper."
Over one's head.
Too difficult or complicated for someone to understand.
This explanation of math is over my head.
Can you explain it in a other way?".
A quick study.
someone who learns new things quickly and easily.
A: "Annie seems to be doing well at her new job."
B: "I'm not surprised. She's a quick study."
Under the weather.
Rain cats and dogs.
ill; sick; unwell.
"Ted was feeling under the weather yesterday, so he decided not to go to work."
Rain very hard.
"You can't leave just now! It's raining cats and dogs
and you don't have an umbrella or raincoat!"
An idioms is a phrase where the words together have a meaning that is different from the dictionary definitions of the individual words.
Easy does it!
Cut it out!
Easy does it!
A: "I'm going to move the table just a little further from the window."
B: "Easy does it! If you move too fast, you might knock over the plant!"
Cut it out!: stop doing something (that's annoying).
"You kids are making too much noise. Cut it out!"