Normcore is a term used to ironically name something "normal" or "natural" when it is, in fact, very strange, deranged, and disturbing. This can range from behavior to an person to a natural phenomena, and is used as a descriptor.
"Did you see that episode of Hannibal? Yeah, Hannibal Lecter is so normcore about Will Graham, I'm sure nothing bad will happen in the later seasons."