cracker

n. 1. One who, or that which, cracks. [ 1913 Webster ]

2. A noisy boaster; a swaggering fellow. [ Obs. ] [ 1913 Webster ]

What cracker is this same that deafs our ears? Shak. [ 1913 Webster ]

3. A small firework, consisting of a little powder inclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- usually called firecracker. [ 1913 Webster ]

4. A thin, dry biscuit, often hard or crisp; as, a Boston cracker; a Graham cracker; a soda cracker; an oyster cracker. [ 1913 Webster ]

5. A nickname to designate a poor white in some parts of the Southern United States. Bartlett. [ 1913 Webster ]

6. (Zool.) The pintail duck. [ 1913 Webster ]

7. pl. (Mach.) A pair of fluted rolls for grinding caoutchouc. Knight. [ 1913 Webster ]

adj. characteristic of country life; as, cracker-barrel philosophy.
Syn. -- folksy, homespun. [ WordNet 1.5 ]

n. a creeping red-berried perenial herb (Cornus canadensis) distinguished by clustered leaf whorls at tips of shoots; Greenland to Alaska.
Syn. -- bunchberry, dwarf cornel, pudding berry, Cornus canadensis. [ WordNet 1.5 ]

n. [ also spelled crackerjack. ] [ prob. from crack + jack, a man. ] 1. An individual of marked ability or excellence, esp. in some sport; as, he is a crackajack at tennis. [ Slang ]
Syn. -- jimdandy, jimhickey. [ Webster 1913 Suppl. +PJC ]

2. A preparation of popped corn, candied and pressed into small cakes. The name Cracker Jack(TM) is now a trademark for a similar confection. [ U. S. ] [ Webster 1913 Suppl. +PJC ]

3. something excellent of its kind.
Syn. -- jimdandy, jimhickey. [ WordNet 1.5 ]

a. [ also spelled crackajack. ] Of marked ability or excellence. [ Slang ] [ Webster 1913 Suppl. +PJC ]

adj. crazy. [ informal or slang ]
Syn. -- balmy, barmy, bats, batty, bonkers, buggy, cracked, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, wacky. [ WordNet 1.5 ]