pshaw vs psht

pshaw

intj
  • Indicating disapproval, scoffery, irritation, impatience or disbelief. 

verb
  • To express disgust or contempt by saying "pshaw". 

psht

intj
  • Synonym of scat 

  • Synonym of pshaw 

  • Synonym of shh 

How often have the words pshaw and psht occurred in a corpus of books? (source: Google Ngram Viewer )