1 : "truth that comes from the gut, not books" (Stephen Colbert, Comedy Central's "The Colbert Report," October 2005)

2 : "the quality of preferring concepts or facts one wishes to be true, rather than concepts or facts known to be true" (American Dialect Society, January 2006)

Truthiness is a satirical term popularized by Stephen Colbert in reference to the quality by which a person claims to know something intuitively, instinctively, or "from the gut" without regard to evidence, logic, intellectual examination, or actual facts.