What is Horriblier?
1.
simply, more
the slang term is used especially to add importance to the thought that the subject is more horrible, or as a slip of tongue when changing the adverb to a comparative adjective.
"That girl looked way horriblier than normal today."
"My ex sucked, he kissed way horriblier than you."
"When I crashed my car into the tree, it was horriblier than the time I fell of my tricycle when I was 3."
See