Why do British people say brilliant?

There are a few reasons why British people might say "brilliant."

* To express enthusiasm or approval. This is the most common reason why British people use the word "brilliant." When someone says something that they think is really good, they might say "That's brilliant!" or "You're brilliant!"

* To exaggerate. When British people say something is brilliant, they don't always mean that it is literally the best thing ever. Sometimes, they just want to emphasize how much they like it. For example, someone might say "That movie was brilliant!" even if they didn't think it was perfect.

* To be ironic. Sometimes, British people use the word "brilliant" sarcastically. For example, someone might say "That was brilliant!" after something has gone wrong. This is a way of making light of a bad situation.

Overall, the word "brilliant" is a very versatile word that can be used in a variety of ways. It all depends on the context in which it is used.