Definitions

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

  • noun Any of several large, long-eared, long-legged hares of the genus Lepus.
  • intransitive verb To move or begin to move rapidly or suddenly.
  • adjective Moving or beginning to move in a sudden, rapid manner.

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

  • noun any of several large North American hares of the genus Lepus
  • verb US To make a sudden, rapid movement

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

  • verb go forward or start with a fast, sudden movement
  • noun large hare of western North America

Etymologies

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

[jack(ass) (from its long ears) + rabbit.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Blend of jackass and rabbit

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