Top Definition
Or Big Fat Mental Patient, as seen in an episode of 'The Simpsons'. A person who is grossly overweight - a fat bastard if you will - who is deemed to be very stupid.
I was watching that BFMP trying to reverse his car and he's so fuckin' fat he couldn't turn his head to see where he was going.
by Shylock McTavish March 07, 2007
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