harsh one's mellow vs piss off

harsh one's mellow

verb

  • To spoil one's good mood or to annoy one. 

piss off

verb

  • To annoy, anger 

  • To leave, to go away. 

intj

  • Go away! 

How often have the words harsh one's mellow and piss off occurred in a corpus of books? (source: Google Ngram Viewer )