Eefing

Eefing (also written eeephing, eephing, eeefing, eefin, or eefn' and doubtless other ways) is an Appalachian (United States) vocal technique similar to beatboxing, but nearly a century older. Jennifer Sharpe describes it as "a kind of hiccupping, rhythmic wheeze that started in rural Tennessee more than 100 years ago."