（原指窗户轩敞， 后借以形容人手腕圆滑， 处事接物面面俱到） be all things to all men; be a perfect mixer in any company; be smooth and slick (in establishing social relations); capable of dealing with all men; clever in dealing with people; (of speech) cover all sides beautifully; manage to please everybody; of a smooth article; sail with every (shift of) wind:
A weathercock and an artful person, he spoke a lot of beautiful words to please people.