One of the mysteries of the English language finally explained.
That is not using or does not (habitually) use something; specifically that does not (habitually) use a drug.
Mid 16th century; earliest use found in John Frith (1503–1533), evangelical theologian and martyr. From non- + using<br>early 20th century; earliest use found in The New York Times. From non- + using, participial form of use.
In this article we explore how to impress employers with a spot-on CV.