What is the origin and meaning of having a Philistine pallet?

by suRubix
CChippy

Are you sure you don't mean the phrase "philistine palate"?

There isn't anything historical about the term. It is modern English combining the common expression "philistine" as "uncultured" and the term "palate" in the sense of "taste or choice of food or drink".

An example could be using the phrase to denigrate someone's choice of wine.