A condition that affects obese teenagers. A fat person will usually talk themselves up in every social setting. They usually do this to mask their low self-esteem. They live in a delusional fanatsy world where they believe people want to hear them talk about themsleves for hours on end.
A man with Fat Douchebag Syndome is an extrmely talkative, overweight, social pariah.
by Jewfin February 05, 2008