turn up one's nose

verb3

1. •
   To tilt one's face upwards slightly, thus raising one's nose, and often to look downwards at someone, as a sign of contempt, disgust, or scorn.

   • 'Not like that!' He shouted. The actors paused, their arms hanging limply by their sides, while Fontan turned up his nose and asked with a sneer: 'What do you mean? What's not like that?' — 1972
2. •
   To refuse something offered, especially with contempt, disgust, or scorn, or with apparent disregard about offending the offerer.

   • I tried to help, but they turned up their noses at my advice.
3. •
   To regard or treat someone with contempt or scorn; to scorn; also, to disregard or ignore someone in a contemptuous or scornful way.

   • [A] Man must be nice indeed, that turns up his Nose at a VVoman, vvho has no vvorse Imperfection, than setting too great a Value upon her Understanding. — 1721