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

  • noun One that is exceptionally, often excessively industrious or zealous.

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

  • noun idiomatic, colloquial One (especially a child) who is very excited or enthusiastic to begin a task.
  • noun idiomatic, humorous A woman with a high sex drive

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

  • noun an alert and energetic person


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  • A person who is extremely keen.

    May 21, 2008

  • Or a beaver who is extremely keen.

    July 20, 2009