When someone reveals secrets related to illegal or unethical practices, he is referred to as a "whistle blower" (sometimes one word).
Reveals his secrets
Reveals his secrets
confidantA best friend
SOAPnet Reveals ABC Soap Secrets - 2004 TV was released on: USA: 16 August 2004
SOAPnet Reveals ABC Soap Secrets - 2005 TV was released on: USA: 26 August 2005
The word "tattletale" in Filipino can be translated as "mantsa." It refers to someone who reveals secrets or information about others without their consent.
The Celebrity Daily - 2011 Holly Madison Reveals Slim-Down Secrets 2-31 was released on: USA: 15 February 2012
A magician never reveals the secrets behind their tricks, breaks the illusion by exposing their methods, or performs a trick poorly on purpose.
The person asked, "What secrets are you hiding?"
They wouldn't be very good secrets if someone provided you with an accurate answer to your question.
What about them? What about them?
When someone reveals something that you didn't want someone to know or fails to live up to a promise previously given.