I'd say it's going on holiday to a foreign country, finding the one British themed pub owned by an ex-pat and eating there every night as you slowly turn into a lobster.
Bonus point for complaining about the locals not speaking for enough English or saying the local "ethnic" food gives you the shits.
These are just my observations as a brit abroad seeing other embarrassing brits.
Also when you hear a Brit speaking slower and louder in order to be understood by someone who clearly doesn't speak English (or doesn't want to understand, fair play, understand that)