whistles on backpacks, specifically those of North Face backpacks, that can be blown in situations of sexual disgust, danger, or discomfort. In addition, the rape whistle is used to intimidate a girl and let her know that she is ugly.
It's a rape whistle, accept its only an anti-rape whistle when blown in cities like East St. Louis or Compton. Instead of scaring rapists, it attracts 5 more every time its blown.