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The Collaborative International Dictionary of English v.0.48 (gcide)

Jackass \Jack"ass`\, n. [2d jack ass.]
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1. The male ass; a donkey.
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2. A conceited dolt; a perverse blockhead; -- disparaging and
offensive.
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{Jackass bark} (Naut.), a three-masted vessel, with only the
foremast square-rigged; a barkentine.

{Jackass deer} (Zool.), the koba.

{Jackass hare}, {Jackass rabbit} (Zool.). See {Jack rabbit},
under 2d {Jack}, n.

{Jackass penguin} (Zool.), any species of penguin of the
genus {Spheniscus}, of which several are known. One
species ({Spheniscus demersus}) inhabits the islands near
the Cape of Good Hope; another ({Spheniscus Magellanicus})
is found at the Falkland Islands. They make a noise like
the braying of an ass; -- hence the name.

{Laughing jackass}. (Zool.) See under {Laughing}.
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