Turpis

Lat.

In the civil law. Base; mean; vile; disgraceful; infamous; unlawful. Applied both to things and persens. Calvin.

— Turpis causa. A base cause; a vile or immoral consideration ; a consideration which, on account of its immorality, is not allowed by law to be sufficient either to support a contract or found an action ; e. g., future illicit intercourse.

— Turpis contractus. An immoral or iniquitous contract