Last usage I heard of hooptie or whooptie was/is (it's still around) to say in highly sarcastic tones, "Well, hooptie-DO," while twirling an index finger in the air, to indicate complete disdain for whatever another person just described. As in,

A: Hey, the guy who wrote "The Bridges of Madison County" has a new book out!
B: Well hooptie-DO.

M.