Top Definition
from the movie "Wind in the Willows". Often said by the character, Tode.
Used to call someone stupid or silly.
Tode: "they're all nincanpoops, everyone of them!"
Badger: "now, now, dont be mean"

What a nincanpoop, i cant believe she did that to me.
by I spell it as Haylie April 17, 2008

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poop that originates from an oompaloompa.
Willy Wonka: "That's a big nincanpoop!"
Charlie: "It sure is."
by Cronz January 29, 2006

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