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A lesbian, ladies' lady, etc. Originally used because white lilies symbolise innocence, and technically relations with another girl don't COUNT, and kept after that point because of the similarity to 'pansy-boy' without actually signifying the same thing.
"...Either she's just always lying
Or she's a lily-girl and denying..." -extract from unofficial Hellsing ballad.
"Do you think Lily-Bet (Queen Elizabeth) is a lily-girl?"
"Nope." -Overheard in London and passed on as rumor.
by S.V May 18, 2006