Juice

Common slang for Vigorish, or simply "the vig," which is the fee--usually a percentage--charged by a bookie on all bets. Another term commonly used to mean the same thing is "the take." According to Wikipedia, vigorish is derived from Yiddish slang originating from the Russian word for "winnings," vyigrysh. Bookmakers use the concept of a vigorish to generate earnings from their books regardless of the outcome of the event being bet on. However, there is no standard formula for calculating vigorish though they are generally formulated so the bookie receives equal action on both sides of the event, therefor having a "balanced" book. In the U.S. "the juice" can also refer to the interest on a loan/debt--generally in relation to a loan shark.