A fork of Rural Dictionary
The original definition from the late 1980's characterizes those late teen-age and early twenty-something males with a prematurely rising/receding hairline.
Dude, what happened to you last summer? You went from a forehead to a five-head.
Huh?
Your hairline is receding...you look thirty.
A large forehead that you make fun of
Adams five-head makes him look gay and balding
Someone who is blessed with having an exceptionally large fore head.
That ant mcpartlain from ant and dec has a canny five head you could show a movie on it.
A rather obvious reference to male masturbation.
He was caught swordfighting the five headed hydra.