Definition & Meaning of "nelly"in English

What is the origin of the term "nelly" and how is it used?

Nelly is a slang term that appeared in mid-20th-century English to describe a gay man mocked for flamboyant or effeminate behavior. The word likely comes from the female name "Nelly," applied metaphorically to emphasize traits culturally associated with women, such as delicacy, grace, or showiness. Historically, it was derogatory, often used to tease, belittle, or insult men who did not conform to masculine norms. Today it is mostly historical, and using it outside informed or affectionate queer contexts is generally considered offensive.