Someone who acts overly obsessed with someone else and pretty much praises them.The Meat refers to dick. Also known as "on their top" or "dickrider."
John: "Dude, My Twitter name got soulja boy in it, my profile picture is soulja boy, my Boxers got soulja boy on it, and my room is filled with posters if him! Im a Huge Fan!"
Brian- "No, You're a Fuckin MeatRider John!" "Get Off his Dick!"