俄にわか分限ぶげん

noun

mushroom millionaire; newly rich person

Rare term for someone who has suddenly become wealthy, often with a nuance of lacking refinement or old money status. The reading にわかぶんげん is a variant.

• 彼かれは俄にわか分ぶ限げんで、急きゅうに大おおきな家いえを買かった。

  He is a mushroom millionaire and suddenly bought a big house.