lead in one's pencil vs lumber

lead in one's pencil

noun
  • A state of erection of one's penis. 

  • Used other than figuratively or idiomatically: see lead, pencil. 

lumber

noun
  • An erect penis. 

  • Useless or cumbrous material. 

  • A baseball bat. 

  • Wood sawn into planks or otherwise prepared for sale or use, especially as a building material. 

verb
  • To fill or encumber with lumber. 

  • To move clumsily and heavily; to move slowly. 

  • To heap together in disorder. 

  • To load down with things, to fill, to encumber, to impose an unwanted burden on. 

How often have the words lead in one's pencil and lumber occurred in a corpus of books? (source: Google Ngram Viewer )