save your money, the cowboys are going to lose.

It doesn’t. You will lose your money. It is illegal.

I’ll unconfuse you! You bet your money; They take your money. Any other Questions?

I’ll use Bodog as an example. Their NFL games are listed here:

Next to the Cowboys, you see this: -7 1/2 (-105) and further to the right: -320.

The first part, -7 1/2 (-105) refers to betting the point spread. -7 1/2 means the Cowboys are favored by 7 1/2 points, i.e. you are betting that the Cowboys will win by more than 7 1/2 points. If you win this bet, you will get slightly less than even money (you’ll win $100 on a $105 bet, to be exact).

You’ll notice it says +7 1/2 by the Giants. The + means the Giants are the underdog, and you would be betting that the Giants will either win, or lose by less than 7 1/2 points.

You don’t have to bet on the point spread, however. That’s what the -320 is. -320 means that if you bet $320 on the Cowboys, and they win (regardless of the score), you’ll win $100. Obviously they don’t pay you much money for betting on a heavy favorite.

You could also bet on the Giants at +260. +260 means that if you bet $100 on the Giants, and the Giants win, you would win $260.

You might also want to check out Wikipedia: