[neither fish nor fowl] also [neither fish, flesh, nor fowl] Something or someone that does not belong to a definite group or known class; a strange person or thing; someone or something odd or hard to understand.
* /The man is neither fish nor fowl; he votes Democrat or Republican according to which will do him the most good./* /Mrs. Harris bought a piece of furniture that was both a table and a chair. Mr. Harris said it was neither fish nor fowl./* /The movie is neither fish nor fowl; it is a funny love story./