Glossary
Binding precedent
A previous court decision that a later court is required to follow. Binding precedent comes from a higher court in the same jurisdiction whose rulings on the same legal issue control the lower court.
When precedent is binding, the lower court doesn't get to disagree, no matter how strongly the judge personally thinks the precedent is wrong. They have to follow it. The remedy for a "wrong" binding precedent is to appeal up to the court that issued it, hoping it'll change its mind: or wait for the legislature to change the underlying law.
The technical Latin name for the doctrine is stare decisis: "stand by what's decided."