Fog Horn

A derogatory term used to describe a loud British person.

*British person being loud*
Non-British person: "Shut the fuck up Fog Horn!"

Crumpet sucker

A derogatory term used to describe the British, as they love their crumpets.

American: "Ah, here comes the crumpet sucker!"

Crumpet stuffer

A derogatory term used to describe the British and their obsession with tea and crumpets.

American: "Here comes the Crumpet stuffer!"

Rooineck

South African version of redneck.

American: "I come from the southern United States and I support Trump."
South African: "Aha, so you're a Rooineck?"