Let the cat out of the bag
Give away a secret
No pain, no gain
You have to work for what you want
The best thing since sliced bread
A really good invention
Once in a blue moon
Rarely
It's a piece of cake
It's easy
The ball is in your court
It's your decision
Saving for a rainy day
Saving money for later
Take a rain check
Postpone a plan
Rain on someone's parade
To spoil something
Pull yourself together
Calm down
Hang in there
Don't give up
Go back to the drawing board
Start over
Take it with a grain of salt
Don’t take it too seriously
Under the weather
Sick
Give someone the benefit of the doubt
Trust what someone says
Spill the beans
Give away a secret
On thin ice
On probation. If you make another mistake, there will be trouble.
Get your act together
Work better or leave
There are other fish in the sea
It's OK to miss this opportunity. Others will arise.
We'll cross that bridge when we get there
Let's not talk about that problem right now
long story short
Tell something briefly
break a leg
good luck
It's raining cats and dogs
It's raining hard
There's a method to his madness
He seems crazy but actually he's clever
A perfect storm
the worst possible situation
hold your horses
wait a moment
Cut somebody some slack
Don't be so critical
Hit the sack
Go to sleep
Better late than never
Better to arrive late than not to come at all
It's not rocket science
It's not complicated
Actions speak louder than words
Believe what people do and not what they say
cost an arm and a leg
very expensive
You can't judge a book by its cover
This person or thing may look bad, but it's good inside
Give someone the cold shoulder
Ignore someone
Wrap your head around something
Understand something complicated
Let someone off the hook
To not hold someone responsible for something
A blessing in disguise
a good thing that seemed bad at first
call it a day
stop working on something
Throw caution to the wind
Take a risk