Once in a blue moon
Rarely
Rain on someone's parade
To spoil something
Saving for a rainy day
Saving money for later
Spill the beans
Give away a secret
The ball is in your court
It's your decision
The best thing since sliced bread
A really good invention
There are other fish in the sea
It's OK to miss this opportunity. Others will arise.
There's no such thing as a free lunch
Nothing is entirely free
You can't judge a book by its cover
This person or thing may look bad, but it's good inside
Kill two birds with one stone"
To solve two problems at once.
Give it a shot!
Give it a try!
We are on the same boat.
We are having the same problem. We are in the same situation.
I'm drawing a blank.
I can't remember.
We're gonna have a blast.
We are going to have a lot of fun.
I'm over the moon.
I'm very excited. I'm very happy.
Hit the nail on the head
You are exactly right.
