noun, noun which may take the genitive case particle 'no'
Refers to a person or thing one is particularly fond of. Often used with the honorific prefix お (お気に入り) in polite or everyday contexts. Can imply favoritism when used for a person (e.g., teacher's pet).
See also: お気に入り
この曲は私のお気に入りです。
This song is my favorite.
彼は先生の気に入りだ。
He is the teacher's pet.