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

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

To show contemptuous or haughty disdain, distaste, or disregard for someone or 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. She turned up her nose at me when I asked her out.
See also: nose, turn, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

turn up one's nose

Regard with disdain or scorn, as in She turned up her nose at the broccoli. This idiom was first recorded in 1779.
See also: nose, turn, up
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

turn up your nose at

show distaste or contempt for something. informal
See also: nose, turn, up
Farlex Partner Idioms Dictionary © Farlex 2017

turn up one's nose at, to

To express disdain or contempt for something or someone. The term presumably alludes to the facial expression of a sneer or to the haughty tossing of one’s head to express contempt. In any event, it has been around since the sixteenth century. “When you are down and out, something always turns up—and it is usually the noses of your friends,” said actor Orson Welles (New York Times, 1962).
See also: nose, to, turn, up
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer