also: だめおんな
noun
no-good woman; female loser
Colloquial, often derogatory term for a woman who is seen as incompetent, irresponsible, or a failure in life.
彼女は仕事も続かないし、お金もないし、本当にダメ女だ。
She can't hold a job and has no money; she's a real no-good woman.
あのドラマの主人公はダメ女だ
The main character in that drama is a female loser, but somehow you can't hate her.
Compound of ダメ (no good, useless) and 女 (woman). The word ダメ itself is of uncertain origin, possibly from the game of Go.