OB TURPEM CAUSAM
ob turpem causam (ob t<<schwa>>r-p<<schwa>>m [or -pem] kaw-z<<schwa>>m). [Latin] For an immoral consideration; on account of disgraceful consideration. • An obligation ob turpem causam (i.e., founded on what was termed turpis causa) could not be enforced.
[Blacks Law 8th]