In Rastafarianism, a baldhead refers to anyone who conforms to common Western standards of hair styling. This is because the short, clean-cut look is often representative (in their eyes) of someone who has adopted a colonial, materialistic and spiritually-bankrupt worldview.
In contrast, a person who grows their hair out, such as into an afro or dreadlocks, is representative (in their eyes) of someone who has let go of obsession with external, physical appearances and turned their attention inward, into the spiritual realm.
"I have never seen the image of a bald head Jesus yet.
He is a humble and dreadlocked Nazarene man, look in yourselves and try to understand
Why you've never seen the image of a bald head Jesus yet."
- Bunny Wailer (Baldhead Jesus)
"Jah would never give the power to a baldhead
Run come crucify the Dread. "
- Bob Marley (Time Will Tell)