noun
pigtails; two braids hanging down
Refers to a hairstyle where the hair is divided into two sections and braided, typically hanging over the shoulders or down the back. Often associated with a youthful or traditional look.
彼女はお下げ髪がよく似合う。
Pigtails suit her well.
小学生の頃はいつもお下げ髪にしていた。
When I was in elementary school, I always wore my hair in pigtails.
From お (honorific prefix) + 下げ (sag-e, 'hanging down') + 髪 (kami, 'hair'), literally 'hair hanging down'. The reading おさげがみ is a compound of these elements.