An extravagant person is someone who is characterized by excessive spending and wastefulness. A SPENDTHRIFT (11 letters) is someone who spends money recklessly and extravagantly, often without regard for the consequences. A SPENDER (7 letters) is someone who spends money freely and without restraint. A WASTREL (7 letters) is someone who spends money carelessly and extravagantly, often with no thought for the future.