Milton Farnsworth Thatherton is a former employee of Strickland Propane who strikes out on his own and opens up the crooked Thatherton Fuels company across the street from Strickland. He dresses like an old school rich cowboy with a ten-gallon hat and cowboy boots and a walrus-style mustache. An untrustworthy type, Thatherton is a sometime foil to Hank Hill and/or Buck Strickland. Whenever Thatherton does something devious, or even merely at the sight of him, Hank or one of his family members is usually heard exclaiming "Thatherton!" (similar to "Newman!" in Seinfeld). At one point, Hank, when trying to entice an obnoxious potential customer, implied the true meaning of "M.F." in Thatherton's name before having Thatherton interrupt him by saying "My friend!"