don't patronize me

don't patronize me

Don't condescend to me; don't talk to me as if I were stupid. A: "Sir, you just need to put your card in the reader there, and then type in your PIN number when it prompts you to." B: "Don't patronize me, I know how to use one of these!"
Farlex Dictionary of Idioms.
See also:
  • can't see a hole in a ladder
  • don't go there
  • don't get me wrong
  • don't beat a dead horse
  • all in (one's) head
  • come it
  • come it (with one)
  • a thing you don't want is dear at any price
  • (I) won't tell a soul