(Go) tell it/that to Sweeney!

(Go) tell it/that to Sweeney!

dated A scornful or incredulous response to a story or statement that one does not believe or finds ridiculous. Chester: "You know, my dad used to play basketball with the President when they were both kids." Dave: "Ah, go tell it to Sweeney, Chester! Why do you tell such fibs?" A: "I bet you I could eat 20 hot dogs in less than half an hour!" B: "Tell that to Sweeney, pal!"
See also: tell, that
Farlex Dictionary of Idioms.
See also:
  • (go) tell it/that to the marines
  • marine
  • tell it to the Marines
  • Tell it to the marines!
  • tell it/that to the marines
  • tell that to the marines
  • cockamamie
  • Don’t make me laugh!
  • don't make me laugh
  • Don't make me laugh!