To get completely rekted or shown out in public... when you lose to your friends after you said how good you lose.

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

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

when you leak nudes or other personal information

To find out someone's secret, or see them doing a shameful act.
Then you yell: "EXPOSED!" while making a "X" by crossing your arms.

Combination of "exposure" and "disposal." Exposal is something that takes place when a person is exposed and embarrassed to the point where they leave and never return.