One of the mysteries of the English language finally explained.
Ex proprio motu.
Late 17th century; earliest use found in John Goodman (?1626–1690). From classical Latin propriō mōtū by his (her, its, etc.) own motion, ablative of proprius mōtus from proprius + mōtus motion, movement.
In this article we explore how to impress employers with a spot-on CV.