Meat-Brain 

A person of generally limited imagination, who originates and passionately carries out hair-brain schemes, or idiotic shenanigans. While religiously insisting on being completely deck out in commando gear or home-made ninja customs.

Two Meat-Brain (s), Robles and Raftery, stalking a larger, out of touch and some what paranoid kid, Palmieri; in a cemetery, while dressed in bdu’s and pretending to be ghost.

Meat-Brain by A Cadet November 16, 2005

braindead meat puppet 

braindead meat puppet is someone who is empty in the head and guided by other people

that braindead meat puppet is fooled by friends into doing something stupid

braindead meat puppet by niva01 June 19, 2023

metabrain 

www.metabrain.com

metabrain by Anonymous September 4, 2003

Meatbrain 

Someone who acts like an airhead and has no clue to what they’re doing. An egghead.

What are you two meatbrains doing on my phone.

Meatbrain by Axrhoe March 9, 2021