look down your nose

look down (one's) nose at (someone or something)

To regard oneself as superior to others and thus act in a haughty or snobbish manner. The well-dressed businessman looked down his nose at the homeless man sitting on the corner. Once Jane was promoted to management, she looked down her nose at the people who used to be her colleagues.
See also: down, look, nose
Farlex Dictionary of Idioms.

look down your ˈnose (at somebody/something)

(informal, especially British English) behave in a way that suggests that you think that you are better than somebody, or that something is not good enough for you: Why do you always look down your nose at people who have less money than you?
See also: down, look, nose
Farlex Partner Idioms Dictionary
See also:
  • look down (one's) nose at (someone or something)
  • look down nose
  • look down your nose at
  • look down your nose at something
  • look down on
  • look down on (someone or something)
  • look down upon (someone or something)
  • down (one's) nose
  • down nose
  • stick nose up in the air
References in periodicals archive
"But you can't afford to look down your nose at anybody."
DECLAN'S FOCUS NOT ON THE TABLE
And it's nothing but snobbery to look down your nose at an organisation because you don't think they'll have the business sophistication to run a football club.
Gers Trust are right to have a go; GORDON WADDELL
Telling the world how clever they are but seemingly unable to gain employment, how dare you look down your nose at the working man.
Letter: YOUR SHOUT - Truth about jobless 'brains'
So if you are driving the latest Renault Espace or Chrysler Voyager, don't look down your nose if an aged, stubby-nosed CA minibus parks beside you.
Where it all began
Don't look down your nose at the match-fixers embroiled in scandal in Italy - because it's an odds-on shot it's happening here too.
RESULT!: It's not just the Italians in a fix
If a drunk comes up to you in a hospitality suite and tells you to 'f*** off to Newcastle', you would look down your nose at him and walk away.
GORDON WADDELL: Boumsong bust-up is just bit too convenient
How about an installment called Don't Look Down Your Nose - I've Got Lovely New Clothes?
TV Land: Trin trashes Trish