Lil B -- Threatens to Curse LeBron James ... You Stole My Dance Too! (Update)

11:36 AM PT -- Iman Shumpert may have just BLOCKED the curse!!!!

After seeing B's threat, Shumpert tweeted at the rapper in an attempt to smooth things over ... writing, "@LILBTHEBASEDGOD Preciate the swag killa. I cooks I chef. all love."

Lil B saw the tweet and wrote back ... "@I_Am_Iman appreciate it brother I got you enough said GO CAVS - Lil B"

Solid move.

LEBRON JAMES HAS JUST BEEN THREATENED WITH THE BASED GOD CURSE!!!!!!

This is a huge deal ... with rapper Lil B sending James an official "warning" -- after Bron and the rest of the Cleveland Cavs did B's cooking dance last night without giving him proper credit.

You know the curse by now -- it's already taken down NBA stars from Kevin Durant to James Harden.

Now, after Lil B got word of the Cavs' hot tub victory celebration -- which included the cooking dance -- Lil B sent the following message:

"Sending a warning to lebron James Kyrie jr smith and iman shumpert yall stealing swag Lil B cooking dance what yall doing #warned - Lil B"

How happy is Golden State right now?