It's when you grunt out the fattest log ever known to man right after you scream in terror and pain.
Person 1: Bro what are you doing Person 2: AHHGHGGGGAGAGGHHGGHHHHH
Person 1: Bro stop it
Person 2: AAGAGGHHGGHHHHHGGGHHHH
Person 1: Holy shit that's a fat log
Person 2: *BAM*
Person 1: Damn bro you okay? Did you just grunt a stoogie?
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".