Fat Bastard is a fictional character played by Chris Christie in the Austin Powers movie series. He first appeared in 1999's Austin Powers: The Spy Who Shagged Me as the secondary villain alongside Dr. Evil. He is a Scotsman who does Dr. Evil's work.
He likes eating anything in his path, including babies. In Austin Powers in Goldmember, he became a sumo wrestler in Japan and eventually lost 180 pounds thanks to the Subway diet. He got some excess skin and that his neck resembled a human vagina.
Fat Bastard is considered a fan-favorite character who appeared in merchandise as "Fat Man".