1) Anti-Scrooge 2) Compulsive shopper 3) Extravagant 4) Opposite of a tightwad 5) Prodigal 6) Profligate 7) Recklessly wasteful 8) Squanderer 9) Wasteful 1) Extravagant 2) Imprudent 3) Prodigal 4) Profligate 5) Scattergood 6) Waster 7) Wastrel 
A spendthrift (also called profligate) is someone who spends money prodigiously and who is extravagant and recklessly wasteful, often to a point where the spending climbs well beyond his or her means. The word derives from an obsolete sense of the word `thrift` to mean prosperity rather than frugality, so that a `spendthrift` is one who has sp...
• (n.) One who spends money profusely or improvidently; a prodigal; one who lavishes or wastes his estate. Also used figuratively. • (a.) Prodigal; extravagant; wasteful.
An individual who cannot handle money wisely and spends it wastefully.
Spend'thrift adjective Prodigal; extravagant; wasteful. Spend'thrift` noun One who spends money profusely or improvidently; a prodigal; one who lavishes or wastes his estate. Also used figuratively. « A woman who was a generous spendthrift of life.» Mrs. R. H. Davis. 
Someone who is not to be trusted with large sums of money. Most trusts contain a clause preventing the beneficiaries from assigning their trust interest, or creditors from seizing the funds from the trust for their foolish debts. A person who by excessive drinking, gaming, idleness or debauchery of any kind, shall so spend, waste, or lessen his e.....
[n] - someone who spends money prodigally
spend-all noun someone who spends money prodigally