A person who was born/raised or lives in Britain.
Some folk think it can be used as an insult but most of us couldn't care less.
We spell our words correctly as Americans spell theirs correctly.. It's just a matter of whether or not you use 'American English' or 'British English'.

I couldn’t care less (but one must keep up appearances, right?)

"Brits" is a nickname that means "British People."

Northern Irish slang for the British Army.

1.A term for a group of British people or Brits.

2.The British version of the Grammies, however they are very different. Artists actually care about Brits and they are given to GOOD artists. The award is in the shape of a Golden Face. The most sought after award in British music.

Brit - Brittish Person

Person who was born in or has citizenship in England, Scotland ,Wales or Northern Ireland

A British person. Can apply to anyone from Great Britain.
Not someone with crooked yellow teeth, big ears and a face that deserves to be punched. These are called rednecks.
Inventors of ~most modern day appliances.
Rule Britannia.