The Collaborative International Dictionary
crackajack
Crackerjack \Crack"er*jack`\, a. [also spelled crackajack.] Of marked ability or excellence. [Slang]
Wiktionary
crackajack
a. (alternative spelling of crackerjack English) n. (alternative spelling of crackerjack English)
Usage examples of "crackajack".
The general was Zach Taylor, who was going to be such a crackajack president a few years later.