when a person(s) gets an extremely large ego.
An example is a person who thinks their $hit doesn't smell.
by BettY SpAghetti June 03, 2003
When a person loses weight, but still see's themselves as larger and bigger than they truly are.
Jane stepped in front of the mirror and saw her reflection. She saw what she always did; an obese human being. While on the other side of the mirror, she was opposite of what she saw. Her doctor had explained to her after her weightloss that she may experience Fathead Syndrome.
by Noellie July 29, 2011