One who sings so that their voice fluctuates rapidly between their normal chest voice and a falsetto, one who yodels.(noun)
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Use "yodeler" in a sentence
"Mater gets to be as maddening as that old Hollywood yodeler Andy Devine."
"In fact, when people in Nairobi first hear American yodeler Jimmie Rodgers centuries later, they embrace the familiar sound and pen tribute songs in his honor."
"Somewhere between the tap dancing yodeler and the trained parrot, I played and sang “Sugartime” by the McGuire Sisters."