Craps is a game chock full of superstitions, here are a few of them:
If the dice are thrown off the table the next roll will be a seven. This can be avoided if the player uses the same dice again. Thus a superstitious player will have the dealer retrieve the dice from the floor for use again.
It is also thought that bad luck follows if the dice touch another players' hand. The way around this is for the player to request new dice.
Never open up a new table or be the only player at a table. Dice are cold at a new table and have to be handled before they can warm up.
Female players in general are considered good luck. Female players who have yet to throw the dice (a virgin shooter) will have a hot roll the first time out.
Male players who have yet to throw the dice (a virgin shooter) are considered bad luck. The dice are considered cold when used by these players as they haven't been used enough yet.
Playing against the dice (making don't pass or don't come bets) is frowned upon because the player making them wins when the shooter loses.
Betting while the shooter is throwing the dice is to be avoided. If the dice hit the new money the next throw will be a seven.
Don't speak or touch a player who is having a good roll.
Don't enter the space between a shooter and other players while he/she's in the midst of a hot roll.
Don't mention the number seven when someone is rolling.