To express delight that something went awfully wrong for someone (they might have had it coming to them or deserved it in someway, or you might dislike them). For example if an insult they used backfired.
Used to describe a car made to sound louder and more aggresive than it actually is. Typically done by Boy racers by fitting an aftermarket exhaust system.
Someone who is very stingy and tight with money. Usually given to GAA match stadium stewards who don't leave people into the stadium for stupid reasons.