What is a fillastien?

Answer 1

This probably is a phonetic spelling of Philistine; the Philistines were an ancient people living in the holy land during the Iron Age, and described in The Bible. Goliath may have been the most famous, as described in the book of Samuel.

Answer 2

There is no widely recognized term or concept called "fillastien." It may be a misspelling or a term specific to a certain context or region. Can you provide more information or context to help clarify?