丸まる儲もうけ

noun, noun or participle which takes 'suru', transitive verb, intransitive verb

clear profit; pure gain; money for nothing

Refers to profit made with little or no investment, effort, or risk; often implies an easy windfall. Can be used as a noun or with する to mean 'to make a clear profit'.

• この取とり引ひきは丸まる儲もうけだった。

  This deal was pure profit.

• 彼かれは相そう場ばで丸まる儲もうけした。

  He made a killing in the market.