pish posh

US /ˌpɪʃ ˈpɑʃ/
UK /ˌpɪʃ ˈpɑʃ/
"pish posh" picture
1.

used to express contemptuous dismissal of talk or ideas

:
“I think it’s a great idea!” “Pish posh, it’ll never work.”
He dismissed her concerns with a wave of his hand and a curt “pish posh.”