What's the idiom?
rain cats and dogs
What's the idiom?
chase rainbows
What's the idiom?
have your head in the clouds
What's the idiom?
take a rain check
What's the idiom?
be/feel over the moon
What's the idiom?
save (up) for a rainy day
What's the idiom?
be/feel under the weather
What's the idiom?
be snowed under
What's the idiom?
every cloud has a silver lining
What's the idiom?
storm in a teacup
What's the idiom?
break the ice
What's the idiom?
be on cloud nine