draw in (one's) horns
To act more cautiously than one did before. I just got this quarter's budget report, and we definitely need to draw in our horns and spend less going forward. I know you love riding your motorcycle, but you're a father now—it's time to draw in your horns. I've definitely drawn in my horns at work now that I know the boss thinks I distract my co-workers too much.
pull in (one's) horns
To begin to act more cautiously. I just got this quarter's budget report, and we definitely need to pull in our horns and spend less going forward.
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