look down (one's) nose at

Translations
смотреть свысока на кого-либо
She tends to look down her nose at anyone who isn’t from an elite background.
Она склонна смотреть свысока на тех, кто не из элитной среды.
Definitions
To regard someone or something with a sense of superiority or disdain; to treat others as if they are less important or worthy.