Craps is a casino game with it's very own language. If you are interested in learning more about the terms used around the craps table I - and users of this website - have put together a craps dictionary.
2 x Odds
This is a so called Odds Bet that is double the size of your pass line bet or come bet. A few casinos offer 10 x Odds or even 100 X Odds - the bigger odds bets you are allowed to make the better - as this bet has no house advantage at all.
3 Way Craps
This is a combination of 3 craps bets in one bet. A 3 Way Craps is one bet on 2 + one bet on 3 and one bet on 12. This bet is very similar to the Horn Bet - except that you don't bet on 11 when you place a 3 Way Bet.
5 Count
This is a craps system - no craps systems will make you win in the long run so it's worthless in my opinion.