Sketchasaurus describes extreme situations exhibiting gross combinations of gnarly, risky, and scary things all in a "sketchy"-like manner.
The word is modeled after the tyranasaurus, the gnarly savage from jurassic park who tore shit up, ate people, and didn't give a fudge.
"yo son what it is"
"nothin OG, just watching that aids-monkey and my girlfriend making out. its one of my many fetishes."
"Oh snap look what they're doing now, that's sketchasaurus."
"I guess you're right, I'll just have to triple-bag it when i get home tonight."