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1.
The word "touché" is also often used in popular culture and general conversation — for example, in an argument or debate — to commend someone on a clever response to an argument. The thank the person for commending you on your cleverness the correct response is to say "chétou"
Guy: "... so THAT is why zombies exist!"

Girl: "ah... touché!"

Guy:"chétou!"
by Rellik Uzi August 27, 2010