shithead
A person that has no consideration for another persons feelings because he/she was born with shit in their head instead of brains

One who is a compulsive liar, every time they open their mouth only shit pours out. Often politely referred to as a bullshit artist
Sid you shithead, you got your mates wife pregnant and continued to bang her while rejecting, lying, and trying to deceive your own family for another eight years. Did you really think they had shit for brains too?