Stealing under the gun is a simple concept of raising pre-flop from under the gun. That’s the position right after the blinds. Most poker theory dictates that one should only play premium cards in these positions, because one is at an instant disadvantage. So if most of the players are under the assumption that players will only play premium cards in this position, adjusting to this can be profitable.

By occasionally raising from under the gun, especially at a tight table, a player can steal the blinds from the early position. This trick can easily backfire if you raise into someone who has a good hand. You end up in a position where you have a poor hand in a poor position. It’s usually better to have something like connector or suited cards, to give you a better chance to hit something on the flop if you do get called.