it's a joke
Mon Dieu, si c'est une blague, elle est pas drôle.
My God, if this is a joke, it’s not funny.
— Battle Royale (2000)
Is this another joke?
Charlotte, c'est une blague, tu me parlais ?
Charlotte, are you kidding? Were you talking to me?
— Laurence Anyways (2012)
It's a joke about you.