Pshaw /(?)/

Pshaw

interj.
  1. Pish! pooch! -- an exclamation used as an expression of contempt, disdain, dislike, etc.

Pshaw

v. i.
  1. To express disgust or contemptuous disapprobation, as by the exclamation “ Pshaw!”
    The goodman used regularly to frown and pshaw wherever this topic was touched upon.