Someone who summarizes a story or large section of text. Derived from the phrase, "in a nutshell."
"Bob is really great at summarizing things into key points. He's quite the nutsheller."
A Short Explanation Of Something.
Nutshell is A Short Explanation Of Something.
Something briefly described, also used with "in a" mostly used as a form of comedy.
Minecraft in a Nutshell
Apple in a Nutshell
Dragon Ball in a Nutshell
Verb - To be summarized; "in a nutshell."
Well, nutshelled, that presentation is saying that smoking is bad.