We tried to learn the expression "rain check" or "To take a rain check" together.
= You can't accept an invitation now but you would like to do it later.
British English might say something like 'I'll give it a miss' or 'I'll catch you/it next time'.
Other weather related expressions:
- a storm in a teacup: unnecessary anger or worry about an unimportant thing - it never rains but it pours: bad luck and bad things tend to happen at the same time - to be/feel under the weather: to feel unwell or ill
The Vocab Man - Fluent Vocabulary