Neither fish nor flesh

Also found in: Idioms, Wikipedia.
neither one thing nor the other.

See also: Fish

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive ?
THE Stone Roses' Second Coming (1994), De La Soul: De La Soul is Dead (1991), Frankie Goes to Hollywood: Liverpool (1986), A-ha: Scoundrel Days (1986), Terence Trent D'arby: Neither Fish nor Flesh (1989).
These two prove that there are still venues out there that are neither fish nor flesh. Fia Backstrom Production employs drastic display tactics to showcase peripheral works (publications, posters, lectures, records, and so on) that will never rest comfortably as "art;" while United Artists, Ltd.
"Neither fish nor flesh nor good red herring" is a phrase sometimes used to describe the unclassifiable.