Understand it figuratively, not literally; it describes an unclear identity or category. Her music is neither fish nor fowl; it mixes genres.
Pro Tip 2/3
Hybrid Situations
Use when something combines elements of different things but belongs to none. This dish is neither fish nor fowl; part stew, part soup.
Pro Tip 3/3
Avoid Literal Use
It's not about fish or birds; it's about things that don't fit typical categories. That movie's genre is neither fish nor fowl, not fitting into a standard classification.