Hi-Fi Fo-Fum was an American audio equipment store of the 20th and 21st centuries. It was located in Richmond Heights, an inner suburb of St. Louis, Missouri, and was in operation from about 1960 until 2011. The name was a variation on fee-fi-fo-fum, with the phrase "hi-fi" interpolated.
The store was founded by Ron Biffert and closed shortly after his death. It was noted for carrying a wide variety of high-end audio and video equipment, for installing many custom sound systems in cars, for home installations of home theaters, and for its long-running iconic radio advertisements, known to generations of St. Louisians. At one time, the company had five locations, in St. Louis, Milwaukee, and Kansas City.
Hi-fi Fo-Fum was given the award for Best Electronics (retailer) in 2010 by the St. Louis Riverfront Times. Attempts by former manager Tony Dollar to keep the store intact after Biffert's death were unsuccessful, and the enterprise was liquidated by Biffert's daughter.