1) A mythical creature often believed in by children that causes mischief and mayhem. Typically one kid will act like a fattigan weasel and go around attacking the humans acting in a fattigan way.
A fart that creeps upward and becomes trapped in your shirt, warming you at the same time. Later, when you take the shirt off, you get a whiff of the remnants of the fart, like you farted again.
On a chilly winter day, a fartigan sweater is kinda nice, until you take off your shirt later on.
A person who secretly attains unneeded fat yet is not arguably overweight and is apathetic towards the subtlely worsening situation. Individual is often characterized by a lethargic appearance but may experience outbursts of energy which are often mistaken for signs of mental illness.
Why are you eating so much candy, you are such a fattican. I knew you were fat before you knew you were fat. You think you're skinny compared to how much I think you are fat.