This term was created by Dr.Singer who in moving from the east coast to the midwest was rather interested by the hillbillies which inhabited the local area, and therefore created this amusing slang term.
Woman: "Have you been to Doctor Singer's Yoga class?"
A word said by those with roots deep in the hills of Kentucky to express anger, excitement, confusion, and a host of other emotions. This word is often said with an exaggerated, if not fake, hillbilly accent.