Meaning

noun a recklessly extravagant consumer

adjective recklessly wasteful

originFrom Middle French prodigal, from Late Latin prōdigālis (“wasteful”), from Latin prōdigus (“wasteful, lavish, prodigal”), from prōdigō (“to consume, squander, drive forth”), from prōd- [from prō (“before, forward”)] + agō (“to drive”). Also see unrelated prodigy. The senses of "abandoning a person or cause" and "returning after abandonment" are by allusion to the New Testament story commonly…

Etymology from Wiktionary, CC BY-SA 3.0