To reveal information about somebody without the person's consent.

Who fucking knows anymore? First, it meant factual, and now it means fictional. What the fuck, internet... what the fuck?

When you teach a class on exposing people.

When someone tells personal information about someone or something to everyone.

To expose. To go naked in front of people you don't know. Depending on who you are, this may be a frequent experience.

expose:
gerund or present participle: exposing

1. make (something) visible by uncovering it.
"at low tide the sands are exposed"
synonyms: reveal, uncover, lay bare, bare, leave unprotected
"the gold covering was flaking away, exposing the white plaster"

2. reveal the true, objectionable nature of (someone or something) - Showing someones true colours i.e, liar, cheater, bully, etc.

As in to roast or to leak info about them making the person being exposed feel sad.