noun
underground money; illegal funds
Abbreviation of 'underground money'; refers to money used in illegal or hidden financial activities, such as bribery, tax evasion, or organized crime.
その事件にはアングラマネーが絡んでいるらしい。
It seems that underground money is involved in that case.
アングラマネーの流れ
It's difficult to trace the flow of illegal funds.