The phrase "to frown upon" means to disapprove or look unfavorably on something. It is a way of expressing that an action, behavior, or idea is not considered acceptable by someone and may be met with negative judgment or criticism.
Sentences with «to frown upon»
Openly looking into pay - to - win techniques is no crime by itself, and is usually a good source of money - but is generally frowned upon by gamers left and right. (altchar.com)
She also donned white — something that is not only not frowned upon in Great Britain, but is actually tradition. (shellchicd.com)
Tethering is generally frowned upon by carriers (see above) since it can be used with computers, laptops, and other non-mobile devices. (android.gadgethacks.com)