• female dog; highly offensive term for a difficult or lewd woman (slang)
• complain, grumble, be embittered (slang)
• if you call a woman a bitch, you mean that she behaves in a very unpleasant way; an offensive use.
• if someone bitches, they complain about something in a nasty way; an informal use.
• a bitch is also a female dog.
son of a bitch
• nasty or disagreeable person, contemptible person (vulgar slang)
• if you call a man son of a bitch, you are referring to them in a very rude way, usually because they have made you angry or upset; an offensive expression, used in american english.