Occasionally I've met people who wondered where the drink name came from, but everybody else in the room was always quick to explain it. Americans may not know

Occasionally I've met people who wondered where the drink name came from, but everybody else in the room was always quick to explain it. Americans may not know all the nuance and details, but the basics ('there was a violent conflict between the British and Irish, particularly regarding Northern Ireland") really are widely known in my experience.