(adj. , Figurative)
To misspeak, or make a mistake so bad that you offend entire nations.

black Dr. Phil

to make a major, unexpected plot twist.

When you think you are about to succeed in something, but then fuck up big time...

Get a woman right on the brink of cumming, then stop and fart really loud while making the family feud X "wrong" noise. Then get the fuck out of there.

When you mislead someone, making it appear as something is going great and then telling them you lied

When the wrong winner is read out at an awards show or presentation.