Fascism is a political ideology that seeks to combine radical and authoritarian nationalism with a corporatist economic system. It's far right of left/right political ideas.
There are many terms that defy a precise definition. Example: "Middle Class", more than 80% of the US population thinks they are middle class. Which obviously can't be the case in a strict definition of the term.
Facist, the term, may escape a precise definition, but like pornography, I know it when I see it.
fastd and his fellow radical right wing tea leafers certainly qualify.