You’re bestfriend who has a fat head nah I’m just playing its an affectionate way of saying they are ur bff fr
“Yo fathead how you doing?”
“Lindsay, Annalise, and Teaona are fatheads.”
To be unusually retarded; stupid.
"How did you manage to break my fishing rod, fathead?"
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!
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.