bonehead vs spod

bonehead

noun
  • Someone who is stubborn, thick-skulled, or stupid. 

spod

noun
  • One who studies excessively and is disliked by fellow students because of it; a swot. 

  • One who uses talkers, an early form of chat room. 

  • One who wastes time on nonproductive activities online. 

  • A container used to distribute a large amount of bait in a single cast. 

verb
  • To fish using a spod. 

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