NELLY
Proper noun
Nelly
A spelling variant of Nellie, a diminutive of the female given names Eleanor and Helen.
One of the Frazier Islands where nellies breed.
A surname.
Etymology 1
Shortened from Nelly Duff, for puff, i.e. breath of life.
Noun
nelly (not used in the plural)
(Cockney rhyming slang) A person's life.
Usage notes
• Used principally in the phrase not on your nelly.
Etymology 2
Noun
nelly (plural nellies)
(derogatory, slang) An effeminate homosexual man.
(British, slang) A silly person.
A giant petrel, Macronectes giganteus and Macronectes halli.
Hyponyms
• (petrel): Antarctic giant petrel, northern giant petrel, southern giant fulmar, southern giant petrel
Adjective
nelly (comparative nellier, superlative nelliest)
(slang) Unmanly; effeminate.
Source: Wiktionary