Machine Gun Kelly knew Sean Strickland wasn't about to "shut the f*** up," and the UFC fighter proved him right on Tuesday ... firing back at the musician with a wild social media post.
The former middleweight champion got wind of the Cleveland rocker/rapper's comments on the "Impaulsive" podcast episode released on Tuesday ... and despite MGK telling the controversial figure to kick rocks, he's not ready to tap out of their feud just yet.
IT'S TIME TO SHUT UP Impaulsive
"Getting lectured by a guy who drinks blood and wears a purse," Strickland said on X.