Each turn a card entry is read out and every player writes down their own made up answer. The hilarity really starts when all these phony answers are shuffled up with the real one and read aloud (keep a straight face so you don't give away which is yours). Everyone then tries to pick which is correct. Players who phony answers are picked score a move on the board.
You can be as wacky or serious as you want, absolute anything goes - but one thing is sure, the answer that sounds right probably isn't.