A cliche is a expression?

worn out

yes, it is French.

What goes around comes around. Better luck next time.

A cliché is a comparative expression that is no longer fresh or interesting because it has been overused. =]

A cliche used to be an original figurative expression, but it is so overused that it is no longer creative. An original figurative expression is a unique phrase that is like a simile or metaphor.