Clanger

noun

1. Something that clangs; an alarm bell (also figuratively).
2. The clapper of a bell, anything that strikes a bell or other metal object to make a ringing sound.
3. A very noticeable mistake; an attention-getting faux pas.
4. An inhabitant of Bedfordshire.
5. A mistake made by a player; counted in the game statistics in the category "errors including frees against".