tell-all

tell-all

1. adjective Exposing, sharing, or revealing all the intimate, scandalous, or salacious details (of something). The aide agreed to give a tell-all interview about her affair with the senator.
2. noun Some piece of writing that exposes or reveals the intimate, scandalous, or salacious details (of something). The actor's tell-all about his experiences in the film industry has shot up to the top of the national bestseller list.
Farlex Dictionary of Idioms.
See also:
  • pearl-clutching
  • bulletproof
  • appropriate for
  • inside baseball
  • as (something) as the next man/woman/person
  • as as the next man
  • man to man
  • man-to-man
  • do or die
  • do or die, to
References in periodicals archive
But the so-called "sensational" tell-all was not only her chance to report the truth, but also to make "a fortune" out of, the insider claimed.
Apart from her alleged romance with the "Troy" actor, some of the other subjects the tell-all will allegedly cover were the actress' difficult relationship with her mother, her rise to fame in her career and rumors surrounding her dating history, the unreliable outlet reported.
Another equally untruthful tabloid, Star, had tried to spread a similar 6 if not same 6 rumor last year, claiming the actress was hoping to get as much as $11 million for her tell-all.
The actress' rep had debunked the rumor then too through the following statement: "Jen has never wanted to write a memoir, and we have continuously made that clear every time gossip magazines have fabricated this story." As it happens, Ansiton has not changed her mind about the tell-all since.
Besides, Aniston is in no need to make "a fortune" through a tell-all nor does she have the time since she a range of projects lined up including movies like "Murder Mystery" with co-star Adam Sandler, "Dumplin" which is a musical comedy film based on the novel by Julie Murphy and "First Ladies" with comedian Tig Notaro, according to (https://www.thecinemaholic.com/jennifer-aniston-new-movie/) theCinemaholic . 
Earlier this year, the tabloid tried to falsely claim Aniston's estranged husband, Justin Theroux was writing a "scathing tell-all" which was going to reveal all the deepest, darkest secrets of his former spouse.
Jennifer Aniston Not Writing Tell-All About Her Personal Life