draw in your horns
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.
draw (or pull) in your hornsbecome less assertive or ambitious; draw back.
The image here is of a snail drawing in its retractile tentacles when disturbed.
1991 Paul Grescoe Flesh Wound Hollywood's major studios were pulling in their horns in the wake of a disastrous Christmas season.