Motion in Limine

A pretrial motion requesting the court to prohibit the other side from presenting, or even referring to, evidence on matters said to be so highly prejudicial that no steps taken by the judge can prevent the jury from being unduly influenced.

Additional Sources

Law.com Dictionary

n. Latin for "threshold," a motion made at the start of a trial requesting that the judge rule that certain evidence may not be introduced in trial. This is most common in criminal trials where evidence is subject to constitutional limitations, such as statements made without the Miranda warnings (reading the suspect his/her rights).

Lawyers.com

A usu. pretrial motion that requests the court to issue an interlocutory order which prevents an opposing party from introducing or referring to potentially irrelevant, prejudicial, or otherwise inadmissible evidence until the court has finally ruled on its admissibility.

Wikipedia

Motion in limine (Latin: "at the threshold") is a motion made before the start of a trial requesting that the judge rule that certain evidence may, or may not, be introduced to the jury in a trial. This is done in judge's chambers, or in open court, but always out of hearing of the jury. If a question is to be decided in limine, it will be for the judge to decide. Usually it is used to shield the jury from possibly inadmissible and unfairly prejudicial evidence.