n. [ 2d jack + ass. ] [ 1913 Webster ]

1. The male ass; a donkey. [ 1913 Webster ]

2. A conceited dolt; a perverse blockhead; -- disparaging and offensive. [ 1913 Webster ]

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. [ 1913 Webster ]