bun vs tunnel of love

bun

noun
  • The vagina. 

  • A tight roll of hair worn at the back of the head. 

  • A drunken spree. 

  • A newbie. 

  • A Korean unit of length equivalent to about 0.3 cm. 

  • marijuana cigarette, joint 

  • A small bread roll, often sweetened or spiced. 

  • A cupcake. 

  • A buttock. 

verb
  • To form (the hair) into a bun. 

  • To smoke cannabis. 

  • To shoot. 

tunnel of love

noun
  • The vagina. 

  • A carnival dark ride for couples in boats, either relaxing and romantic, or spooky (encouraging the couple to cling to one another). 

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