Another one is: I wouldn't dare! A great quote from an even greater movie (Pulp Fiction): "I dare you, I double dare you, motherfucker!" - Jules Winfield

Use it how you like, there are many ways. (same amount as a man must walk down...) a few examples of use: I dare you! don't you dare tell my girlfriend what you saw! I dare not swim in deep water She doesn't dare refuse her parents I dare say truth or dare? (a child's game) If you want a better, more thorough explanation then bite me...or (rather) ask me:)