User blog comment:SilhouetteCp/What's a Creepypasta?/@comment-10789912-20160116053422

A "Creepypasta" is a slang term for any horror story told online.

Stories that you'd tell at camp fires as kids to spook each other, things of that nature. It's all horror, and it's all Creepypasta. Sadness can help certain stories grow, but it is not part of the definition of the term.