on someone's case

idiom
Updated on: 15 Nov 2017

Definition of on someone's case

informal
: frequently criticizing someone or telling someone what to do
  • Her brother is always on her case about the clothes she wears.

Word by Word Definitions

someone play
  1. : some person : somebody

case play
  1. : a set of circumstances or conditions

  2. : a situation requiring investigation or action (as by the police)

  3. : the object of investigation or consideration

  1. : a box or receptacle for holding something

  2. : a box together with its contents

  3. : set

  1. : to enclose in or cover with or as if with a case : encase

  2. : to line (something, such as a well) with supporting material (such as metal pipe)

  3. : to inspect or study especially with intent to rob


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