One of the mysteries of the English language finally explained.
A person (usually a man) regarded as lonely or having no friends. Usually as a humorous surname used with a generic first name, as "Billy No-Mates", etc.
1990s; earliest use found in The Sunday Telegraph. From no + the plural of mate, probably popularized by use as a T-shirt slogan in the early 1990s.
In this article we explore how to impress employers with a spot-on CV.