My sister came up with this word to describe me when she was about eight years old. It is a portmanteau combining "hilarious" and "comedian." It is used sarcastically conveying the idea that "although you think you're funny, you're not."
Dude: Jack be not nimble; Jack be not quick; Jack couldn't jump over that therecandlestick.
Bro: Hilarious, dude.
Dude: I'm a poet, I knows it.
Bro: Yeah, you're a real hilarian.
"Hilaristurbing" (adj) used to describe something that is both HILARious and dISTURBING.
It's origin is from an online story written by Alexandra Erin called "Tales of MU".
In the story - an adventurous nymph named Amaranth describes her attempt to teach a horse to count with the intent to avoid her deity's prohibition against lying with unintelligent beings. Chapter 60 - Leather
“Hey, I just discovered a new adjective,” Steff said. “‘Hilaristurbing’.” She turned to me. “I think Amaranth has exited the dungeon, hon…”
- to find humor in bad or serious situations - to find a certain adversity or misfortune laughable
- to view a strike of bad luck as funny/hilarious - to maintain cheerfulness during a tragedy or disaster