peen vs shvantz

peen

noun

  • Penis. 

  • The (often spherical) end of the head of a hammer opposite the main hammering end. 

verb

  • To shape metal by striking it, especially with a peen. 

shvantz

noun

  • A penis. 

  • A useless person. 

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