prodigal
[adjective]
Synonyms: extravagant, excessive, immoderate, improvident, profligate, reckless, spendthrift, wasteful

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Antonyms: parsimonious

[TahlilGaran] English Synonym Dictionary ▲

I. prod‧i‧gal¹ /ˈprɒdɪɡəl $ ˈprɑː-/ adjective [usually before noun] formal
[Date: 1500-1600; Language: Latin; Origin: prodigus, from prodigere 'to drive away, use wastefully']

1. prodigal son/daughter someone who leaves their family and home without the approval of their family, but who is sorry later and returns

2. spending money, wasting time etc in a careless way Synonym : extravagant:
a prodigal lifestyle

[TahlilGaran] Dictionary of Contemporary English ▲

II. prodigal² noun [countable] literary
someone who spends money carelessly and wastes their time – used humorously

[TahlilGaran] Dictionary of Contemporary English ▲