1. (n.) One who spends money profusely or improvidently; a prodigal; one who lavishes or wastes his estate. Also used figuratively.

2. (a.) Prodigal; extravagant; wasteful.

big-time spender dissipative easy come easy go extravagant improvident incontinent intemperate lavish overgenerous overlavish overliberal penny-wise and pound-foolish pound-foolish prodigal prodigal son profligate profuse spend-all spender squanderer squandering wasteful waster wastethrift wastrel