British. No idea how we have a reputation for politeness; borderline abusive piss-taking is standard between mates, as is referring to each other as cunts. Groups of lads, and particularly middle-aged pub goers, can often be lairy, loud, obnoxious, aggressive louts.
It’s baffling. Though in fairness, this stereotype exists mainly in the US. Countries we can get to via EasyJet or RyanAir have probably long been disavowed of this impression.