Do you know what backbiting is?" They said: "Allah and His Messenger know best." He said: "It is to say of your brother what he dislikes

The Prophet (may Allah's peace and blessings be upon him) clarified the prohibited backbiting, which is to speak about an absent Muslim in a way he dislikes, whether you mention traits related to his manners or appearance, like saying the one-eyed man, the cheater, the liar, and or any other reprehensible trait, even if it truly exists in him. However, if the trait does not exist in him, this is worse than backbiting. This is slander, which is to fabricate bad things about someone.