look down your nose at something
look down your nose at somethingINFORMAL
COMMON If someone looks down their nose at a thing or person, they regard that thing or person as inferior and treat them with disrespect. I get the impression they look down their noses at people who are not dressed in expensive labels. I thought he'd look down his nose at pop music. Note: You use this expression to show that you disapprove of this attitude.