It is simplest to assume that vigorish is factored in proportionally to the true odds, although this need not be the case. Under proportional vigorish, a moneyline odds bet listed at −100 vs. −100 without vigorish (fair odds) could become −110 vs. −110 with vigorish factored in. Under disproportional vigorish, it could become −120 vs. +1... Found on http://en.wikipedia.org/wiki/Vigorish
A slang term, also abbreviated to vig, for the commission or fee charged by a bookmaker or casino on a wager. Also the interest on a loan from a loan shark or unregulated loan provider. The term is Yiddish (Jewish) deriving from the Russian word vyigrysh, meaning winnings Found on http://www.encyclo.co.uk/local/22643