Other persons betterthinking just verbally slapped you. Used sarcastically to indicate that one is unable to argue against another's absurd logic, or a witty point.
Bart: I want to go with you, Dad.
Homer: Don’t you have school?
Bart: Don’t you have work?
Homer: Ah, Touché.
A word derived from French that is used most-commonly when someone makes a particularly good point in an arguement and leaves the opponent (the touché sayer) speechless or at a loss for words.
-If incest is a sin then what the fuck does that make Adam and Eve?
If one person presents an argument and another delivers a clever or appropriate response, the first person may respond with "touché" as a way of acknowledging a good response.