"accidentally" spill your orange juice all over his lap. He'll clear the room for a bit. When he does, move his stuff to the kiddie table. After all, he's the one who has food all over himself, so that's clearly whereby belongs.
I'm joking, kind of. My point is that verbally going against bombastic personalities is usually a lose for people who are not also naturally bombastic, regardless of whether or not they have a megaphone. It's not just the noises it's the arrogance and the blinders. You Stan a better chance retaking the room via thinking and reacting in subversive manners, I think.
At least it usually works for me.