"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…”