Eefing (also written eeephing, eephing, eeefing, eefin,[1] or eefn'[2]) is an Appalachian (United States) vocal technique similar to beatboxing, but nearly a century older.
NPR's Jennifer Sharpe describes it as "a kind of hiccupping, rhythmic wheeze that started in rural Tennessee more than 100 years ago.
"[3] An eefing piece called "Swamp Root" was one of the first singles recorded and released by Sam Phillips.
Singer Joe Perkins had a minor 1963 hit, "Little Eeefin' Annie" (#76 on the Billboard chart), featuring eefer Jimmy Riddle, whom Sharpe calls "the acknowledged master of the genre".
The song "Hillbilly Beatbox" by The Evolution Control Committee prominently features eefing recordings.