Legal maxim and Latin for a party alleging his own infamy / turpitude is not to be heard. A person alleges or boasts of his or her own depraved conduct should not be heard from in court. When a person does an act which may be rightfully performed, he cannot say that such act was intentionally done wrongly. See In re Hallett, where an obiter dictum found in the judgment of the Court is as follows: When we come to apply that principle (i.e., the one given above) to the case of a trustee who has blended trust moneys with his own, it seems perfectly plain that he cannot be heard to say that he took away the trust money, when he had a right to take away his own money.