judgment call

Short definition from Wiktionary

Noun

1. 1
   A ruling by an umpire, referee, or similar official during a sporting event, based on his or her perception of events and in the absence of any objective measurement.
2. 2
   Any decision or other determination based on subjective criteria, especially one which takes into account the particular circumstances of a situation.
3. 3
   The summons which will call the spirits of the deceased to their heavenly reward at the time of Final Judgment.