<P> Jinx is a children's game with varying rules and penalties that occur when two people unintentionally speak the same word or phrase simultaneously . </P> <P> A jinx can be initiated when at least two people say any same word or phrase at the same time . One of them then calls "jinx" on the other . </P> <P> The game ends when someone speaks the jinxee's name or the jinxee speaks . In the latter case, the jinxee loses the game, and often a penalty is exacted, typically a punch on the arm . </P>

Where did the phrase jinx you owe me a coke come from