"Asshole reading, or Asshole Readings" though it may sound unconventional, is a form of psychic reading that has gained recognition within certain circles of the psychic community. In this practice, the psychic focuses on interpreting the wrinkles and features present in the private area of the client.
Usage:
"I can't believe asshole reading is an actual thing now. People are getting their private areas examined by psychics for insights into their lives."
"Urban Dictionary has a definition for asshole reading? That's wild!"
"I'm not sure if I believe in asshole reading, but it's definitely an interesting concept."