Clean Hands Doctrine

Definition from Nolo’s Plain-English Law Dictionary

The principle that a party who has acted unethically or in bad faith in relation to a lawsuit will not win the suit or be granted equitable relief by the court. For example, if a contractor is suing a homeowner to recover the price of work he did on the home, his failure to perform the work as specified would leave him with unclean hands.

Definition provided by Nolo’s Plain-English Law Dictionary.