noun
revealing talk; inside story; exposé
Colloquial noun for a conversation or story that reveals hidden truths, secrets, or behind-the-scenes details, often in a gossipy or confessional tone.
彼の暴露話にみんな驚いた。
Everyone was surprised by his revealing story.
芸能人の暴露話が週刊誌に載っていた。
An exposé about a celebrity was published in the weekly magazine.
内緒話 is a secret conversation or whisper, often private, whereas 暴露話 is about revealing secrets to others, sometimes publicly.
Compound of 暴露 (exposure, disclosure) and 話 (talk, story).