One who is addicted to meth/crank to the point that they are running on auto-pilot alone and been high for so high that all intelligent thought is long gone.
1. More commonly known as toilet paper, but can also be used to describe napkins used to wipe really nasty junk off of your hands. It's also more fun to say than napkin. (try it)
2. It can also be used to describe babies... Kin, like the German "chen" is often used to indicate someone or something that is small (or in an endearing mannner), so a little crap is a crapkin. (mostly because babies poop way more than you'd expect) Their diapers can also be called crapkins.
Boy- "Dad, we need some more crapkins!"
(ex. 2)
Random mom- "Dangit John, the last thing we need is another crapkin running around here!"
The name given to toilet paper used to stuff between your buttcheeks after you finish wiping your ass to collect any remaining feces
Friend 1: "Yo is that a Crapkin next to that table over there?"
Friend 2: "Yes and that dude is about to pick it up and throw it away, not knowing that was stuffed up someones ass!"