pronunciation | \ka-‘lop-sE-a\
neologisms | New words can come into being by using old rules of language to create new language. Kalopsia is one of these words. It’s a neologism, so it may not be in any dictionaries, but it has been used before.
I’ve seen enough 50 tag strings, keyboard smashes and “I can’t”s to know that Tumblr suffers from this like a fish suffers from being wet.