cost an arm and a leg
very expensive
Spill the beans
Give away a secret
The ball is in your court
It's your decision
Take it with a grain of salt
Don’t take it too seriously
Actions speak louder than words
Believe what people do and not what they say
Give someone the cold shoulder
Ignore someone
Put something on ice
Put a project on hold
Saving for a rainy day
Saving money for later
It's not rocket science
It's not complicated
There's no such thing as a free lunch
Nothing is entirely free
call it a day
stop working on something
Pull someone's leg
To joke with someone
You can't judge a book by its cover
This person or thing may look bad, but it's good inside
No pain, no gain
You have to work for what you want
Let the cat out of the bag
Give away a secret
There are other fish in the sea
It's OK to miss this opportunity. Others will arise.
A bird in the hand is worth two in the bush
What you have is worth more than what you might have later
We'll cross that bridge when we come to it
Let's not talk about that problem right now
Under the weather
Sick
hold your horses
wait a moment
Once in a blue moon
Rarely