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n. or jack rabbit
Any of several large, long-eared, long-legged hares of the genus Lepus.
intr.v. jack·rab·bit·ed, jack·rab·bit·ing, jack·rab·bits
To move or begin to move rapidly or suddenly: "A rear tire blew out and the car jackrabbited out of control" (Sonny Kleinfield).
Moving or beginning to move in a sudden, rapid manner: won the race with a jackrabbit start.

[jack(ass) (from its long ears) + rabbit.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

jack′ rab`bit

any of various large hares of W North America, having long hind legs and long ears.
[1860–65; jack (ass) + rabbit; so named from the size of its ears]


(ˈdʒækˌræb ɪt)

1. resembling a jack rabbit, as in suddenness or rapidity of movement.
2. to go or start forward with a rapid, sudden movement.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
hare, rabbit, jackrabbit - Hares live in the open and bear young that have fur at birth, while rabbits live in burrows and bear young that are naked at birth; jackrabbits are hares, not rabbits.
See also related terms for naked.
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.jackrabbit - large hare of western North Americajackrabbit - large hare of western North America
genus Lepus, Lepus - type genus of the Leporidae: hares
hare - swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs; young born furred and with open eyes
Lepus townsendi, whitetail jackrabbit, white-tailed jackrabbit - largest hare of northern plains and western mountains of United States; brownish-grey in summer and pale grey in winter; tail nearly always all white
blacktail jackrabbit, Lepus californicus - the common jackrabbit of grasslands and open areas of western United States; has large black-tipped ears and black streak on the tail
Verb1.jackrabbit - go forward or start with a fast, sudden movement
jump, startle, start - move or jump suddenly, as if in surprise or alarm; "She startled when I walked into the room"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
A big jackrabbit crossed our path, leaping swiftly and silently like a deer.
This part of the country was too settled for large game, but Billy kept Saxon supplied with squirrels and quail, cottontails and jackrabbits, snipe and wild ducks.
"It's a great, great, great day to be a Jackrabbit," said South Dakota State coach Aaron Johnston, who suffered a fat lip in the postgame celebration.
It was just another day when 74-year-old Tex Harold Gilligan, of Dona Ana Count, New Mexico, USA, decided to go out jackrabbit hunting with his three dogs Charlie, Scooter and Cowboy.
Other performances by upcoming artists on the 7th Wave Stage featured Doyoureallylikeit?, Stefan and Asma, Byron Gindra, Jackrabbit Slims and Mystic Visions.
They also see a packrat, a roadrunner, a bobcat, a jackrabbit, a cottontail and a mule deer, some animals that come out after dark.
Valdez, Santiago, Dy, Mika Reyes, Aby Marano and Denden Lazaro formed the starting unit that got Team Phl to a jackrabbit 9-2 start.
To achieve that jackrabbit start, LeBron went 4-for-4 from the field for 11 points in a perfect first quarter, proceeding to finish once more in the 40s with his game-high 44 points in 41 minutes.
The Tehuantepec jackrabbit, Lepus flavigularis (Wagner, 1844), is a endemic species to Oaxaca, Mexico, whose distribution has been reduced to only four isolated populations with less than 1 000 individuals; so that has been listed as an endangered species (Lorenzo, Cervantes, Barragan, & Vargas, 2006; Smith, 2008; IUCN 2015; Lorenzo, Rioja-Paradela, & Carrillo-Reyes, 2015).
A dangerous but mythical animal of Native American folklore described as a jackrabbit with antlers
Ten male suspects are wanted for questioning after stealing merchandise from Nike and JackRabbit. 
Hard work and the cowboy life on the 6B's Ranch is nothing new to old jackrabbit Hitchin' Post.