stick to one's 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 and firing their gun(s) at an enemy, even when the situation might be dangerous or hopeless. The prosecution is going to try to 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.
See also: gun, stick
Farlex Dictionary of Idioms.

stick to one's guns

Hold fast to a statement, opinion, or course of action, as in The witness stuck to her guns about the exact time she was there. This expression, originally put as stand to one's guns, alluded to a gunner remaining by his post. Its figurative use dates from the mid-1800s.
See also: gun, stick
The American Heritage® Dictionary of Idioms by Christine Ammer.

stick to one's guns, to

To persist, to stand firm. Originally this term was (and in Britain still is) to stand to one’s guns and referred to a gunner’s obligation to remain at his post. By the mid-eighteenth century it was being used figuratively, as by James Boswell (Life of Johnson, 1791): “Mrs. Thrale stood to her gun with great courage in defense of amorous ditties.”
See also: stick
The Dictionary of Clichés by Christine Ammer
See also:
  • stand by (one's) guns
  • stick by (one's) guns
  • stick to (one's) guns
  • stick to guns
  • stick to your guns
  • stick to one's guns, to
  • make a dead set upon (someone or something)
  • make a dead set at
  • make a dead set at (someone or something)
  • screw (one's) courage to the sticking place