Definition from Wiktionary, the free dictionary
jinx (plural jinxes)
A hex; an evil spell
A person or thing supposed to bring bad luck
To cast a spell on
To bring bad luck to
- Used after the same response is said by two people simultaneously. Often, a game is played where the person who failed to say "jinx" first becomes "jinxed", whereby they cannot speak until someone says their name.
- (used after simultaneous response): snap