let someone have it

Meanings:

• 1.

  USUKAustraliaCanadainformalcolloquial
  • To criticize or reprimand someone severely; to give someone a harsh verbal attack.
  • To punish someone verbally with strong words or reproach.

• 2.

  USUKinformalslang
  • To attack someone physically, especially by hitting or striking; to assault.
  • To unleash violent force against someone, including shooting in some contexts.