Answer: whoopee

AnswerCrossword Clue
WHOOPEEExuberant cry
WHOOPEE"Yee-haw!"
WHOOPEEKind of cushion
WHOOPEE"Yahoo!"
WHOOPEEHilarious yell.
WHOOPEEUproarious festivity: Slang.
WHOOPEEShout of exuberance
WHOOPEE"Yay!"
WHOOPEEType of cushion
WHOOPEECushion of pranks
whoopeeboisterous fun, also WHOOPIE
whoopee(used as a shout of exuberant joy)