disapproval If you say that a man is a philanderer, you mean that he has a lot of casual sexual relationships with women. = womanizer. a man who has sex with many women, without intending to have any serious relationships (philander (17-19 centuries), from Philander name given to a lover on old plays, from phil- (from philos; -PHILE) + aner )
One that plays at courtship; a fickle lover; a flirt (usually applies only to men)