A person who generally doesn't care about shit, and commonly refuses to pay for things. It also is a way to identify yourself as confident, bold, and stubborn.
Brad: Bro! You only got 10 minutes to make it across campus!
Marshall: Boy, I got a baldhead, I'll make it there in 5.
Mark: You really drank the last of Tommy's beers? You got a baldhead!
Jeff : mmhmm, I know