From Longman Dictionary of Contemporary Englishturn your nose up (at something)turn your nose up (at something)informalREJECT/NOT ACCEPT to refuse to accept something because you do not think it is good enough for you My children turn their noses up at home cooking. → nose
Examples from the Corpus
turn your nose up (at something)• Many professors turn their noses up at television.• Time and again he had to turn his nose up into the arch of the drain to keep from drowning. 