DCHP-1 Online
cracker 
1 n. Slang anything extraordinary; a crackerjack.
- 1890 I'm clean gone on that fly head-gear of yours. She's a cracker.
- 1922 "Tis the land of the gales, sir," said Salty Bill. "In the last nine days you has been gone but one day come clear. In the cracker last night, rifle shots woke me. 'Twas the big provision tent strippin' to pieces. . . ."
2 n. the lash of a dog-whip, which can be made to crack like a pistol shot.
- 1896 (1898) The cracker is 11.5 inches long of three-ply twisted babiche.
- 1890 I'm clean gone on that fly head-gear of yours. She's a cracker.