An "unjust judge" refers to a person in a position of authority, like a judge, who does not make fair and impartial decisions. They might favor one side over the other or make choices based on personal biases instead of the law. Full definition
In it a widow, someone who was powerless in first century Palestine, wanted justice but faced the indifference of the «unjust judge.» (relevantmagazine.com)
Only one point is intended in both parables; God is not to be compared to the lazy friend or the unjust judge. (religion-online.org)
If an unjust judge can be importuned into responding to a poor widow, how much more can you trust the God who reaches Out to you in the word of forgiveness. (religion-online.org)