Fivehead

Listen up, dummy! This is a classic insult. It's saying someone's forehead is so big it's the size of five foreheads, not just one. And instead of just dreaming like a normal person, they got enough brainpower to produce cinematic masterpieces in their sleep! I know it's hard for a pea-brain like you to understand. You probably think a fivehead is a measurement unit or sumthin'.