Jahnessa

Jahnessa is a character who was quickly killed in a story read in one of Mopia's Scary Story Night events. The story was found in the subreddit r/nosleep and it quickly became a meme in the Mopia server.

It's very common for Mopians to use the phrase "JAHNESSA MOMENT" and to reference the story in different ways, especially by talking about Wendigos and S'mores.