stick to your guns
stick to one's guns
To remain determined, resolute, or steadfast in one's opinion, belief, or perspective; to refuse to be persuaded by someone else into believing or doing something one does not agree with. (Alludes to a soldier remaining sticking and firing his or her gun(s) at an enemy, even when the situation might be dangerous or hopeless.) Primarily heard in UK. The prosecution is going to try and trip you up with your statement and your alibi, but so long as you stick to your guns, there's nothing to worry about. I really admire Jess for sticking to her guns during college, and not submitting to the peer pressure of those around her to drink or do drugs.
stick to your guns
COMMON If you stick to your guns, you refuse to change your decision or opinion about something, even though other people are trying to tell you that you are wrong. Once you have decided what is and isn't acceptable, stick to your guns despite your child's protests. He should have stuck to his guns and refused to meet her. Note: The image here is of soldiers remaining in position, even though they are being attacked by the enemy.