turn your nose up
US /tɜrn jʊər noʊz ʌp/
UK /tɜrn jʊər noʊz ʌp/

1.
faire la fine bouche, dédaigner
to refuse to accept something because you feel that it is not good enough for you
:
•
She always turns her nose up at fast food.
Elle fait toujours la fine bouche devant la restauration rapide.
•
Don't turn your nose up at a good opportunity.
Ne tourne pas le nez devant une bonne opportunité.