British people don’t always say directly what they mean. Beware! As a traditional Brit, you want to be polite and restrained, but still be effective in conveying your message. The tool of your choice is understatement, and it works both ways: whether you are going to praise someone to heaven or tear them to pieces, always use moderate words.

To interpret these, here is a small phrase book that may help you understand British understatement (via BuzzFeed).

Related: Swearing at work (The Poke).