Vigorish
Part of speech: noun
Definition: A charge taken on bets, as by a bookie or gambling establishment. The interest on a loan of money, especially for loans made by a usurer or loan shark. An amount owed on account of or payment of a bookie's charge or of interest.
Rake-off
Part of speech: noun
Definition: A percentage of an amount of money taken by a third-party as a bribe or as part of an unlawful enterprise.