Soldiers in the Roman Legions used to shave down pig knuckles into the shapes of cubes, and toss them onto their inverted shields as a form of entertainment while in camp. Hence we get the term "to roll the bones". We do know that the game we know today as "craps" came to the United States from Europe.

A new game in Craps begins with the ""Come Out"" roll. A "Come Out" roll can be made only when the previous shooter fails to make a winning roll more correctly known as "not making the "Point"" or "seven out". A new game then begins with a new shooter. If the current shooter does make his "Point", the dice are returned to him and he then begins the new "Come Out" roll. This is a continuation of that shooter's roll, although technically, the "Come Out" roll identifies

To bet with the shooter, you must place your bet in an area marked ""Pass Line", before the new shooter rolls the dice. The so-called "Pass Line" is a strip on the table layout marked by two lines roughly two inches wide and it rims the entire table layout across from the Box Man. To bet against the shooter, you must place your bet in an area marked "Don’t Pass". This area is a strip on the table layout and it rims the table directly above the "Pass Line".No matter what stage the game is in, whether on the "Come Out" roll, or in progress, you can jump in immediately and place any bets. The only exception to this is the bet called the "Pass Line" bet with odds", which can be made only on the "Come Out" roll. You can, however, bet with the shooter even while the game is in progress by placing a "Pass Line" bet without odds. Placing your chips halfway over one of the two lines framing the "Pass Line" area does this.