This document lists and defines common British idioms and their meanings. Some of the idioms include "it's raining cats and dogs" meaning it's raining hard, "a storm in a teacup" meaning making unnecessary fuss, and "once in a blue moon" meaning very rarely. Other idioms covered include "a cat in gloves catches no mice", "let the cat out of the bag", "it's a piece of cake", "my dogs are barking", "drink like a fish", "have kittens", "a mouse potato", "have a whale of a time".

1. British idioms

2. It’s raining cats and dogs It’s raining hard

3. A storm in a teacup Making a lot of unnecessary fuss

4. Once in a blue moon Very rarely

5. A cat in gloves catches no mice If you are too polite, you may not get what you want

6. Let the cat out of the bag Reveal a secret

7. It’s a piece of cake It’s very easy

8. My dogs are barking My feet hurt

9. Drink like a fish Drink a lot

10. Have kittens A dramatic way of expressing anxiety

11. A mouse potato Someone who spends a long time sitting in front of the pc

12. Have a whale of a time Enjoy yourself a lot