Most of the time Ludacris is pretty happy-go-lucky, but he wasn't at a recent show in Atlantic City.

He was there to perform at the grand opening of the Hard Rock Hotel & Casino. Someone threw a plastic cup at him, so he stopped the music and issued a threat.

“I'll come down there and whoop your motherfucking ass," yelled Luda. ”Who the fuck threw the shit? Throw something else up here and watch what the fuck happens."

The show went on without further incident and the person who threw the cup was never identified or asked to leave.

You can check it all go down below.

A post shared by Cheekywiki.com ™ (@theofficialcheekywiki_) on Jul 2, 2018 at 11:18am PDT