demoness; ogress; she-devil
Mythological or folkloric female demon, often depicted as a fierce, monstrous woman. Can also be used figuratively for a cruel or terrifying woman.
昔話に出てくる鬼女は、山奥に住んでいた。
The demoness in the old tale lived deep in the mountains.
彼女は
married woman (slang, derogatory or jocular)
Internet slang pun on 既女 (also read きじょ, 'already a woman'), used derogatorily or jokingly to refer to a married woman, often implying she is no longer desirable or has a fierce personality. Not used in polite conversation.
See also: 既女
When she gets angry, she's as scary as a demoness.
On the internet, married women are sometimes called 'demonesses' (a pun on 既女).
Standard kanji spelling for both the mythological demoness and the slang sense.
Compound of 鬼 (oni, 'demon') and 女 (onna, 'woman'). The slang sense is a pun on the homophone 既女 (kijo, 'already a woman').