Call it a day
Flogging a dead horse
They argued about the budget for over an hour and they they realized they were flogging a dead horse.
Raining cats and dogs
Raining really hard
Better take your umbrella to walk to the post box, it's raining cats and dogs!
Drop the ball
Fail on a responsibility.
I asked my son to pick up the mail, but he dropped the ball and I had to get it myself.
Don't cry over spilled milk
Don't get upset over something trivial or something that can't be changed.
I know you didn't get the grade you wanted on the test, but there's no point in crying over spilled milk.
Face the music
She didn't finish the work on time and now she had to face the music.
In the dog house
In trouble.
When Bob realized he forgot to bring home the milk, he knew he'd be in the dog house.
Rain on my parade
To disappoint someone
I was excited about going to the movie, but my brother rained on my parade and told me it was canceled.
Take your best shot
Try your best at something you may not know well.
I know you haven't done this before, but take your best shot
Chip off the old block
When someone is like their parents
With your red hair and the same quick temper as your father, you are sure a chip off the old block.
Hit the nail on the head
To have something exactly right.
When you said we needed to send out a customer survey, you really hit the nail on the head!
Butterflies in your stomach
To be nervous.
When it was time to present her speech to the class, Anna had butterflies in her stomach.
Steal my thunder
Take away someone's excitement or to take credit for something.
I was about to explain the solution to the problem, but John explained it first and stole my thunder.
Get off the hook
Rachel delivered the weekly report for him, so Joe was off the hook.
Head in the clouds
Daydreaming
He should have been paying attention in class, but he had his head in the clouds.
It's not rocket science.
It's not difficult.
You should be able to figure out this new notification system. It's not rocket science.
A dog's life
To have it easy.
Because he was staying with his parents and didn't have to pay rent or expenses he was really living a dog's life.
Rain Check
A promise of something in the future
I can't go to dinner with you tonight, but can I take a rain check for later this month?
Out of your league
When something is beyond your reach.
He wanted to ask the beautiful girl out for dinner, but she was out of his league.
Monkey see, monkey do
Children will do what they see you do.
Better be careful not to swear in front of the kids - monkey see, monkey do!
Get the ball rolling
To get something started.
"Dan, could you get the ball rolling by explaining what the problem is?"
Get your ducks in a row
To get organized or prepared.
She only had one week to finish her project, so she needed to get her ducks in a row.
She was sad the party was canceled, but the cloud had a silver lining - she had more time to do her homework.
Front Runner
Something that is the most likely possibility
Of all the movies for this year's Oscar, "The Barbie Movie" is the front runner.
Inexperienced
Even though she had a college degree, Maria was still wet behind the ears at her new job.