noun. A beef patty with legs. Like "meathead," this does not imply high SAT scores.
Real citation: "38. Toby Keith Crimes: The worst kind of proud-to-be-brainwashed dolt, one who feels he should express himself. The fact that this ambulatory hamburger’s opinions were ever given public forum is an indictment of our entire civilization and all human history leading up to this point. " ("The Beast 50 Most Loathsome People in America, 2004," The Beast, http://www.buffalobeast.com/66/50mostLoathsome2004.htm)
Made-up citation: "If the Pledge of Allegiance is ever ruled unconstitutional, may I suggest the Pledge of Asswipe as an alternative: 'I pledge asswipe to the fucking moron of the United Shit-for-brains of Asshat, and to the ratfucker for which it stands, one numbnuts, under geekazoid, indivisible, with lunkhead and jerkwad for ambulatory hamburger.'"