Britpolar
A name for the cultural oddity of which is the fact that British people are either incredibly friendly, down to earth, and calm, or pretentious douchebags who believe they are better than everyone else.
Person 1: "There's two British guys at our school, one is the coolest dude ever, but the other is a complete asshole"
Person 2: "That's called Britpolar my friend.
Person 2: "That's called Britpolar my friend.