pull in your horns

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.
See also: horn, pull
Farlex Dictionary of Idioms.

pull in your horns

or

draw in your horns

If you pull in your horns or draw in your horns, you start behaving more carefully than you did before, especially by spending less money. The world's big spenders have pulled in their horns during the recession. Customers are drawing in their horns at a time of high interest rates. Note: When snails sense danger, they pull in their `horns', which are the stalks that their eyes are on.
See also: horn, pull
Collins COBUILD Idioms Dictionary, 3rd ed.

draw/pull in your ˈhorns

start being more careful in your behaviour, especially by spending less money than before: After making huge losses, the company had to draw in its horns by cancelling some major projects.
See also: draw, horn, pull
Farlex Partner Idioms Dictionary
See also:
  • pull in (one's) horns
  • pull in one's horns
  • draw in (one's) horns
  • draw in horns and pull in horns
  • draw in your horns
  • draw/pull in your horns
  • haul in (one's) horns
  • wear the horns
  • no doubt about it
  • show (one's) horns