a tard and a half
a brain-dead mess who can't even think straight and makes your head hurt just by being around
My cousin is a tard and a half. He tried to fix my phone and now it's broken and he's still confused.
My boss is a tard and a half. He asked me to bring him coffee and then forgot he wanted it.
My neighbor is a tard and a half. He yelled at the mailman for delivering the wrong paper and then threw it at a dog.
xs