Is the 'Irish goodbye' rude? Experts say most people get it wrong

You might need a little luck of the Irish to pull it off, but slipping out of a party or leaving a bar without saying goodbye isn’t always rude, etiquette experts say.

With St. Patrick's Day celebrations in full swing around the world, revelers may be tempted to make a quick, quiet exit commonly known as the "Irish goodbye" despite its debated origins. Yet how it's carried out can be a fine line between rude and polite.

"It depends on the scenario," Washington, D.C.-based etiquette coach Alison Cheperdak...