noun
older woman who has never had children
Internet slang, derogatory. A play on 子供部屋おじさん, referring to a mature woman who has never given birth, often implying she is past typical childbearing age. Used in online discussions to criticize or mock.
See also: 子供部屋おじさん
ネットでは「子供部屋未使用おばさん」という言葉がたまに使われる。
The term 'kodomobeya mishiyō obasan' is occasionally used online.
彼女は自分を「子供部屋未使用おばさん」と自嘲した。
She self-deprecatingly called herself a 'kodomobeya mishiyō obasan'.
The male counterpart: a middle-aged man who still lives in his childhood room, often used to criticize unmarried men living with their parents. This term is the female version, focusing on never having had children.
A play on the internet slang 子供部屋おじさん (kodomobeya ojisan), replacing おじさん (middle-aged man) with おばさん (middle-aged woman) and adding 未使用 (unused) to emphasize never having given birth. The exact origin is uncertain, but it emerged in online communities as a derogatory label.