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3.
Prejudice against overweight persons. Also weightism. Very common in Europe, less so in America where most of the population is out of shape.
Fatism permeates the fasion industry.
by Count of Monte Christo July 01, 2004
 
1.
Fatism defines the prejudice to fat people (aka being rude to fat people)
Ryan: Fat people are fat!
Omar: Hey, ryan! Don't say that! That's fatism! :O
by OmzWG June 07, 2014
 
2.
The motivational encouragement of fat people to become thin again.
friend: Do you support fatism?
me: Yes I do. I am talking to 3 fatsos, trying to make them realize how ugly and stupid they are.
by 2HITLER4ME July 26, 2014