spendthrift
spend-thrift
noun
A person who spends money extravagantly and wastefully.
"He was a spendthrift, always buying new gadgets."
adjective
Characterised by extravagant and wasteful spending of money.
"His spendthrift ways led to financial ruin."
Thesaurus
Synonyms: prodigal, wasteful, extravagant, profligate, scattergood, spend-all, spender