Richard Sherman -- SPOOFS SIDELINE RANT ... With Michelle Obama

She already dunked on LeBron ... now Michelle Obama is getting screamed at by Richard Sherman in a spoof of his epic NFL sideline rant ... in the hopes she can convince kids to eat succotash.

Mrs. O recruited the Seattle Seahawks star -- along with Russell Wilson and Earl Thomas -- to appear in a video to promote her Let's Move initiative ... encouraging kids to eat healthy and exercise.

In the video, Sherman whips up a salmon and succotash combo -- and breaks into Erin Andrews screaming mode to brag about the meal.

"WE THE BEST CHEFS IN THE GAME!!!"

It's kinda funny ... especially the last scene at the end. Still, nothing compares to the original.