It's basically "I will smack you in the face", but it's referencing to the incident at the 2022 Oscars where Will Smith smacked Chris Rock in the face because of a joke Chris Rock made about his wife. However, there's a controversy whether the act Will Smith committed was justified because of the fact that his wife, Jada Smith, had cheated on him. Some will say that it was, and some will say it wasn't, then there are people who will say that both Will Smith and Chris Rock were in the wrong, because Chris made a joke about Jada, and Will got up and smacked him, hence, the events go from making an inappropriate joke about someone's wife, and the husband reacted inappropriately, hence, the point of why Chris Rock and Will Smith were both in the wrong.
"I will Will Smith your Chris Rock if you don't stop spamming my email."