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1.
A bum head is a person who no one likes.
Fuckin' hell Kenroy you are a bum head!
by Petesbigtool May 03, 2006
 
2.
A person or other item boasting the common rectum as a cranium.
Fozzy you are such a Bumhead. Let's have sex.
by Ms. Sarah Suckme February 20, 2005
 
3.
Someone who has done wrong by you.
That Sarah is such a bumhead.
by tazman07 June 28, 2007