ball sack vs loony

ball sack

noun

  • An objectionable person (especially a man). 

  • The scrotum. 

loony

noun

  • An insane or very foolish person. 

adj

  • Insane. 

  • Very silly, absurd. 

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