Bonehead

From the urban dictionary...

bone head:   

An poorly behaved, assinine person (usually male) who lacks consideration for others and posseses zero potential for character growth.
My last roomate was a frickin bone head. Brang chicks home every nite, punched holes in our walls, and never paid his last two months of rent.

Bone head:
   
a person who asks a very stupid question, that is obviously fuckin retarded and lacks any long term goals and isnt going anywhere in life.
Set worker- is there really rum in ur coke?
Julian- Of course there is, you fuckin bone head