I mean 'Calvinism' is either synonymous with the orthodox faith or the most serious danger to that faith. Depends on your theological stable.
To call someone a Calvinist could either be an insult or a acclamation. In some ways the word Calvinist divides Christians like none other.
Here's the irony. We've never read any of Calvin's writings. If you know anything about Calvinism it's probably associated to the acronym TULIP which stands for: