Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A stupid or silly person.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A scatterbrained or stupid person.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a stupid incompetent person

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Probably obsolete nit, nothing (from German dialectal, from Middle High German niht, nit; see nix) + wit.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

nit +‎ wit

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