To get ( or to hold) In chancery Meaning, Definition & Usage

Definitions
  1. (Boxing), to get the head of an antagonist under one's arm, so that one can pommel it with the other fist at will; hence, to have wholly in One's power. The allusion is to the condition of a person involved in the chancery court, where he was helpless, while the lawyers lived upon his estate.

Webster 1913