slack-jawed vs stupid

slack-jawed

adj
  • Unsophisticated or unthinking; dimwitted in appearance. 

  • With the mouth in an open position and the jaw hanging loosely, especially as indicating bewilderment or astonishment. 

stupid

adj
  • Lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence. 

  • Dulled in feeling or sensation; torpid. 

  • Amazing. 

  • Replaces an obscene or profane word. 

  • To the point of stupor. 

adv
  • Extremely. 

noun
  • A stupid person; a fool. 

  • The condition or state of being stupid; stupidity, stupidness. 

How often have the words slack-jawed and stupid occurred in a corpus of books? (source: Google Ngram Viewer )