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Definitions

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

  • n. A stupid or foolish person.
  • adj. Extremely foolish or stupid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. silly or stupid
  • n. a silly or stupid person

from the GNU version of the Collaborative International Dictionary of English

  • n. A great fool; a trifler.

from The Century Dictionary and Cyclopedia

  • n. A silly fool; a trifler: also used attributively.
  • n. The Jamaican rainbird, Saurothera vetula.
  • To act foolishly find triflingly.

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

  • n. a person who lacks good judgment

Etymologies

Tom (nickname of Thomas) + fool.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • Dalrymple really meant what he had said and would stick to it, she need not mind being called a tomfool by her mother.

    The Last Chronicle of Barset

  • If Dalrymple really meant what he had said and would stick to it, she need not mind being called a tomfool by her mother.

    The Last Chronicle of Barset

  • What you want to do is get behind my tomfool words and get a feel of the man that's behind them.

    Chapter XIV

  • And you don't need much strategy, so you don't have to buy one of those tomfool microphone headsets.

    Channel Your Inner Net Jackass in Team Fortress 2

  • Only one of them, a little man with a wrathful air, in a sheepskin coat wide open, and a lambswool cap pulled right over his eyes, on coming up to the gingerbread man, suddenly inquired: ‘How much is the gingerbread, you tomfool?’

    The Diary of a Superfluous Man and other stories

  • I gave each a mocking salute, driven by I don't know what tomfool bravado.

    The Black Company

  • "Why do you let that great tomfool call you by your first name, Mary?" he demanded, almost before the front door was shut.

    The Nest Builder

  • I had just got as far as that, when the gentleman said "Pshaw!" and then he told me to run off, and not come into the church again to tomfool -- that's what he said.

    Odd

  • I don't like to apply such a tomfool word to anything, but observe how all this has come about.

    Master of His Fate

  • He'd got hold of some tomfool idiotic ideas about the situation in India.

    Murder on the Orient Express

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