turn up your nose at

turn up (one's) nose at (something)

To show contemptuous or haughty disdain, distaste, or disregard for something. The duke turned up his nose at having to sit beside local fishermen during the press event. The members of the board may turn up their noses at our plan, but they'll come to realize that it's the only chance we have of keeping the company afloat.
See also: nose, turn, up

turn up your nose at

show distaste or contempt for something. informal
See also: nose, turn, up