give someone something to think about

Meanings:

• 1.

  Englishneutralliteral
  • To provide a person with information, facts, or material that requires consideration or reflection.

• 2.

  British EnglishAmerican Englishidiomaticneutral
  • To present a challenge, problem, or provocative point that prompts someone to reconsider, reassess, or take action.