shart vs shut my mouth

shart

noun
  • An instance of sharting. 

  • The resulting excrement from sharting. 

verb
  • To unintentionally defecate due to relaxing the anus to flatulate. 

shut my mouth

intj
  • An exclamation of surprise or astonishment. 

How often have the words shart and shut my mouth occurred in a corpus of books? (source: Google Ngram Viewer )