dirty secret
  i was getting bored of christina, so i figured the quickest way to end it was to share with her my dirty secret
"  when you are doing a girl from behind, you softly pull her hair back and whisper in her ear "i have aids""
"  i was getting bored of christina, so i figured the quickest way to end it was to share with her my dirty secret" What is the definition of "dirty secret"?