An insult meaning:
A-Someone's head is big and ugly.
B-Similar to poohead but fatness instead of poo; basically a more convenient way of saying 'fatnesshead'
OW THAT HURT!
Don't tough me again with that thumbtack you ugly fathead!
by yers police May 20, 2021
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The word Fathead is used to define the act of saving a shite for when you visit someone else's home to save on toilet paper.
John regularly pulls a Fathead by saving up a massive shit for when he visits a friend.
by ScubadoobaSteve August 3, 2021
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