Top Definition
Similar to an atheist, only a fatheist does not believe in fat chicks. Not even thick chicks. This results in him being a poor wingman, but reduces his odds of being crushed to death.
Guy A: Dude, I could totally nail this chick, you've gotta take her friend for me.
Guy B: Man, I'd bite the bullet and do it, but that's not a bullet, that's a fking cannon ball.
Guy A: Please! I'm begging you.
Guy B: Sorry, no can do. I'm a fatheist.
by J. Agnew June 21, 2010
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