Weight stigma, also known as weightism, weight bias, and weight-based discrimination, is discrimination or stereotyping based on one's weight, especially very fat people.
Stigmatization based on body weight can lead to a devalued social identity and the stigmatized people are often ascribed stereotypes or other labels denoting a perceived deviance which can lead to prejudice and discrimination. Common, “weight-based”, stereotypes are that obese persons are lazy, lack self-discipline, and have poor willpower, but also possess defects of intelligence and character. Other common weight-based stereotypes of obese persons are that obese persons are unattractive, unhealthy, have a bad diet and/or don't exercise. Pervasive social portrayals of obesity create and reinforce biased attitudes.