A craps bet that a 7 rolls before a number, paid at true odds.
The opposite of a Buy bet: you win if a 7 comes before the 4, 5, 6, 8, 9 or 10. It pays true odds (1 to 2 when you lay the 4), so you win less than you bet, and the vig is 5% of the amount you win. Example. Lay 40 against the 4 and if the 7 comes first you win 20 and pay 1 in commission. A 7 is more likely than a 4, so you win more often, but each win is small and a loss costs 40.