bovine vs dead from the neck up

bovine

adj
  • Sluggish, dull, slow-witted. 

  • Of or pertaining to cattle. 

  • Belonging to the family, subfamily, tribe, or genera including cows, buffalo, and bison. 

noun
  • An animal of the family, subfamily, tribe, or genera including cattle, buffaloes and bison. 

dead from the neck up

adj
  • Very stupid; brain-dead. 

How often have the words bovine and dead from the neck up occurred in a corpus of books? (source: Google Ngram Viewer )