A slang term from
Rhode Island, I believe, refering to someone who absolutely has
no clue whatsoever. Often a
cluemaster needs to be
whapped with a
cluestick.
The best part about this term is that usually the aforementioned target of the term is so clueless that you can call them a cluemaster to their face and they probably won't get it.
Example:
"Oh yeah, he's a real cluemaster, isn't he?"
"You know what it is about you? You're such a cluemaster..."