Blue Waffle (slang - sexist) - Blue Waffle is a fictional sexually transmitted infection (STI) that’s believed to both turn the vagina blue and disfigure it. It’s also said to originate from women’s promiscuity and/or lack of hygiene. People say it only transmits from women to men. Interestingly (but probably unrelated), a less common meaning for the word blue is “indecent, somewhat obscene, or risqué.” [http://www.dictionary.com/e/slang/blue-waffle/]