1. An obese, or fat person who is also an asshole ( short for Fat Fuck ). 2. Stupid moron with a rather large body mass.
Omar yelled out seriously rude remarks to the man in the car next to him. Not knowing he did anything wrong, the man shrugged and started his car. Omar then climbed into his car, and it sagged heavily from his huge weight. Suddenly, the man next to him yelled over "Shut your damn mouth you dumb Faffuck!".