Rule/throw something out of court
Definition 1 of 2
Pro Tip 1/3Legal Invalidity
Used to describe a situation where evidence or a case lacks legal standing to be considered in court. 
Due to the improperly obtained evidence, the defense moved to rule it out of court.
Pro Tip 2/3Courtroom Rejection
Implies a lawyer or judge does not accept evidence or an argument, often due to legal technicalities. 
The hearsay testimony was ruled out of court.
Pro Tip 3/3Final Decision
Once something is ruled out of court, it typically cannot be brought up again within that trial. 
After the objection, that line of questioning was ruled out of court.