slut; easy lay
Derogatory slang for a sexually promiscuous woman. Strongly offensive; used in casual, often hostile contexts.
あの女はビッチだって噂だよ。
Rumor has it that woman is a slut.
The section chief is a real bitch, always yelling at her subordinates.
悪女 describes a scheming or wicked woman, whereas ビッチ (sense 2) is used more loosely as an insult for a bossy or unpleasant woman.
Loanword from English 'bitch', adopted into Japanese slang with similar derogatory meanings.