RhymeZone: nelly definitions

Definitions of Nelly:

name: A female given name (common: 1 in 12500 females; popularity rank in the U.S.: #1009)

noun: (Cockney rhyming slang) A person's life.
noun: (derogatory, slang) An effeminate homosexual man.
noun: (Britain, slang) A silly person.
noun: A giant petrel, Macronectes giganteus and Macronectes halli.
adjective: (slang) Unmanly; effeminate.
noun: A spelling variant of Nellie, a diminutive of the female given names Eleanor, Helen, and Chanel.
noun: One of the Frazier Islands where nellies breed.
noun: A surname.

(Definitions from Wiktionary)