Be aware there are spoilers for IT Chapter Two (2019), IT (2017), the 1990 miniseries, and Stephen King's novel. We all know Pennywise is terrifying. Whether you grew up on Stephen King's novel, Tim Curry's iconic performance in the 1990 miniseries, or just met the dancing clown via Bill Skarsgard's unique but equally terrifying performance in Andy Muschietti's two-part film adaptation, the consistent through-line is that the creature known as It is an ungodly manifestation of our most primal fears. And one creepy clown. But what exactly is It? Well, that's not …