a man who behaves in a dishonest or unfair way 卑鄙的人;粗鄙的人;无赖 He’s no gentleman; he’s a cad! 他可不是正经人,他是个无赖。
Word Originlate 18th cent. (denoting a passenger picked up by the driver of a horse-drawn coach for personal profit): abbreviation of caddie or cadet.