https://en.wikipedia.org/wiki/Kangaroo_court

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A kangaroo court is a court that ignores recognized standards of law or justice, and often carries little or no official standing in the territory within which it resides.[1] The term may also apply to a court held by a legitimate judicial authority who intentionally disregards the court's legal or ethical obligations. The defendants in such courts are often denied access to legal representation and in some cases, proper defence and the right of appeal.

Prejudicial bias of the decision-maker or from political decree are among the most publicized causes of kangaroo courts.[citation needed] Such proceedings are often held to give the appearance of a fair and just trial, even though the verdict was already decided before the trial actually began.

A kangaroo court could also develop when the structure and operation of the forum result in an inferior brand of adjudication. A common example of this is when institutional disputants ("repeat players") have excessive and unfair structural advantages over individual disputants ("one-shot players").[2]