Webster's Revised Unabridged Dictionary · 1913

Jackass

Jackass , noun

[2d jack + ass.]

1.
The male ass; a donkey.
2.
A conceited dolt; a perverse blockhead; -- disparaging and offensive.
Collocations (5)
Jackass bark (Nautical) , a three-masted vessel, with only the foremast square-rigged; a barkentine.
Jackass deer (Zoology) , the koba.
Jackass hare or Jackass rabbit (Zoology) , See Jack rabbit, under 2d Jack, n.
Jackass penguin (Zoology) , 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 (Zoology) , See under Laughing.