Antonym of FRUGAL

Frugal : sparing or economical as regards money or food.
Gaudy : extravagantly bright or showy, typically so as to be tasteless.
Generous : showing a readiness to give more of something, especially money, than is strictly necessary or expected.
Extravagant : lacking restraint in spending money or using resources.
Charitable : relating to the assistance of those in need.

Antonym of Frugal is Extravagant