take down a notch

Meanings:

• 1.

  General English (US, UK, etc.)informalcolloquial
  • To reduce someone's pride, self‑importance, or social standing; to humble or chastise someone so they appear less arrogant.
  • To diminish the perceived status, reputation, or esteem of a person or thing.

• 2.

  General English (US, UK, etc.)informal
  • To lower the level, intensity, or degree of something by a small amount (for example, a setting, volume, power, or speed).
  • To reduce a measure or value by a minor increment.