1.) A person that obsessively eats and steals your food.
2.) A name you call someone when they're being mean, rude, or annoying. You may call them this when they eat too much or don't feel like getting off the couch.
She steals my food everyday..She's such a fatwad.
I ate too much for breakfast.. I feel like such a fatwad.
Get away from me, FATWAD!