Do you know of a good derogatory term for a British person?

I can't find any. Odd. The only one I know of is Brit. My friend Watson calls me a Mick and my boyfriend a **** all the time. (In good fun) I can't think of anything good to fire back with. Research has turned over nothing. I was trying to make up one. Came up with Meat Boiler. Anything else? Sheesh.