Great Odin's Raven comes from Anchorman: The Legend of Ron Burgundy, released in 2004, where Will Ferrell's 1970s news anchor peppers broadcasts with absurd historical exclamations. The phrase riffs on Odin, the Norse god associated with two ravens, Huginn and Muninn, but Burgundy treats it as a serious oath. Clips of his catchphrases circulated through quote sites, forums and early meme videos, and this one survived as a shorthand reaction for disbelief. Editors still use it because the delivery is instantly recognizable even without the film scene attached.