Also called (for senses 2, 3): arsehole or (US and Canadian) asshole▶ USAGE Dating back at least a thousand years, and taboo till around the middle of the 20th
century, this venerable "Anglo-Saxon" word now seems unlikely to cause offence in
all but the most formal contexts. Its acceptability has possibly been helped by such
useful verb formations as "to arse about" and "I can't be arsed"