Obrb ( poker )

1) The term usually applies to a draw game, generally lowball, and is often shortened to OBRB. A game in which the first player to the dealer's left blinds the pot and the next player raises before getting his cards. Often called just raise blind.
2) This is usually part of a proposition. That is, one player asks another, "Open blind, raise blind?" This means, "If you open the pot blind, I will raise you blind."