Let someone off the hook
To not hold someone responsible for something
Cut somebody some slack
Don't be so critical
Take a rain check
Postpone a plan
Look before you leap
Take only calculated risks
Go back to the drawing board
Start over
Give someone the benefit of the doubt
Trust what someone says
By the skin of your teeth
Just barely
Pull yourself together
Calm down
Hit the sack
Go to sleep
It's not rocket science
It's not complicated
Hang in there
Don't give up
On thin ice
On probation. If you make another mistake, there will be trouble.
We'll cross that bridge when we come to it
Let's not talk about that problem right now
cost an arm and a leg
very expensive
Wrap your head around something
Understand something complicated
Make a long story short
Tell something briefly
hold your horses
wait a moment
Rain on someone's parade
To spoil something
There's no such thing as a free lunch
Nothing is entirely free
There's a method to his madness
He seems crazy but actually he's clever
Under the weather
Sick
Let the cat out of the bag
Give away a secret
It's a piece of cake
It's easy
A blessing in disguise
a good thing that seemed bad at first
On the ball
Doing a good job
It's raining cats and dogs
It's raining hard
Add insult to injury
To make a bad situation worse
Put something on ice
Put a project on hold
Pull someone's leg
To joke with someone
Once in a blue moon
Rarely
call it a day
stop working on something
The ball is in your court
It's your decision
A penny for your thoughts
Tell me what you're thinking
A perfect storm
the worst possible situation
Take it with a grain of salt
Don’t take it too seriously