sit in judgment on (one)

sit in judgment on (one)

To make a judgment about one (for something they have done). The defendant's notoriety made it difficult to find anyone who could sit in judgment on him without bias.
See also: judgment, on, sit
Farlex Dictionary of Idioms.

sit in judgment (up)on someone or something

to make a judgment about someone or something. (Upon is formal and less commonly used than on.) I don't want to sit in judgment upon you or anyone else, but I do have some suggestions. There is no need to sit in judgment on the proposal at this time.
See also: judgment, on, sit
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • sit in judgment on
  • let he that is without sin cast the first stone
  • let he who is without sin cast the first stone
  • let him that is without sin cast the first stone
  • let him who is without sin cast the first stone
  • dig (someone or oneself) out of a hole
  • be the last (person) to (do something)
  • be the last person
  • have a broad back
  • weak moment