Fear, uncertainty, and doubt (FUD) is a sales or marketing strategy of disseminating negative (and vague) information on a competitors product. ... Logo of FUD FUD Ham FUD (pronounced like the English word food) is a brand name for hot dogs, sausages, and cold cuts produced by the Mexican company Sigma Alimentos, which itself is part of the ALFA industrial conglomerate. ... The vagina, (from Latin, literally sheath or scabbard ) is the tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. ...
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Free software advocates now often apply FUD as a label to the people who they feel are trying to make the FUD smears against Linux or other open source projects like Mozilla Firefox.
FUD can be used to offhandedly 'smear' criticism or legitimate debate, even in cases where the allegations are without merit or are merely implied; this tactic is often used in cases where the initial publicity surrounding claims of FUD is likely to vastly overshadow any subsequent retraction.
Who actually utilizes FUD is a question that leads to difficulties with distinguishing objective and subjectivetruth.