Katt Williams came on Shannon Sharpe's "Club Shay Shay" with guns blazing ... and taking shots at Steve Harvey, Cedric The Entertainer, Rickey Smiley and more rivals.

Katt ripped several of his famous contemporaries in what he called a 2024 reckoning ... starting with his "Next Friday" costar Rickey Smiley for claiming their roles in the film were reversed before filming began when he appeared on "CSS" last year.

Katt says not only was he always cast as "Money Mike," he was responsible for rewriting the character's scene to prevent an on-screen rape with Terry Crews' character "Damon."

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