Vigorish

[Merna]

[Vigorish], or [vig], meaning the juice, or interest collected when a loan is paid back [overdue].

[Rihanna]

An excessive rate of interest on a loan, typically one from an illegal moneylender.

[Dorothey Allen]

[Interest] [paid] to a [loan shark]

[Dave Paprocki]

a charge made on [bets] by a casino or similar

establishment

interest on a [loan], especially applied to loans made by

usurers or loan [sharks]
(from Yiddish, from Russian, Vyigrish profits)