hold/stand your ground
hold (one's) ground
1. To brace oneself and maintain one's position during or when anticipating an attack. The other team's offense was incredibly aggressive, but our defense held their ground. Despite the guy's size, I managed to hold my ground during the fight.
2. To refuse to yield, compromise, or be belittled; to stand up against an attack or insult. The boss scoffed at her idea initially, but she held her ground and explained it in greater detail. He kept offering me less money, but I held my ground and got the full asking price.
stand your ground
A phrase referring, in the United States, to a law that allows one to use force that would otherwise be illegal against a person that they perceive as posing an immediate threat of serious bodily harm. The name comes from the idea that one can "stand one's ground" rather than retreat. The shooter's state has a stand your ground law, so it's unlikely he'll face any charges, even though the man he shot was unarmed. It's still too early to tell whether the prosecutor will consider this a case of "stand your ground."