Antonyms for thrifty

all:

wasteful.

economical:

generous, wasteful, uneconomical, spendthrift, extravagant.

noun:

munificent, liberal, charitable, unsparing, squandering, pound-foolish, freehanded, lavish, unselfish, indulgent, uneconomic, openhanded, Unthrifty, shortsighted, bountiful, thriftless.