Don't be such a Hampton Wick.
Hampton Wick
idiom Vulgar
Cockney rhyming slang · East London
prick
Origin
disputed originThe Wick part of the name is from wick (Etymology 2).
He acted like a total Hampton Wick when he shouted at the waiter for no reason.
Despite his polished suit and expensive car, his colleagues privately dismissed him as a complete Hampton Wick due to his arrogant behavior.