noun
Refers to a cut of meat, especially the tenderloin. Often used in cooking contexts. The cross-reference to ヒレ肉 suggests a similar meaning, but フィレ肉 is the katakana-based spelling.
See also: ヒレ肉
フィレ肉は柔らかくてステーキに最適です。
Fillet meat is tender and perfect for steak.