noun
gangster income source; racket
Colloquial term used in yakuza and crime contexts for a money-making activity or revenue stream, such as protection rackets, gambling, or drug dealing.
あの組のシノギは主にみかじめ料だ。
That gang's main income source is protection money.
彼は新しいシノギを探しているらしい。
It seems he's looking for a new racket.