Answer: spendthrift

AnswerCrossword Clue
SPENDTHRIFTAnti-Scrooge
SPENDTHRIFTNonfrugal sort
SPENDTHRIFTOpposite of a tightwad
spendthriftA person who spends money in an extravagant, irresponsible way
spendthriftone who spends his money recklessly