Expose

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.

Katherine: Did you hear James got exposed for cheating on his girlfriend
Luke: Okay, well if he cheated then he deserves it.