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crack·er·jack(krăk′ər-jăk′) also crack·a·jack (krăk′ə-)
Of excellent quality or ability; fine.
a person or thing of exceptional quality or ability
[C20: changed from crack (first-class) + jack1 (man)]
a confection of caramel-coated popcorn.
1. a person or thing that shows marked ability or excellence.adj.
2. exceptionally fine.
[1890–95, Amer.; earlier crackajack, rhyming compound based on crack (adj.)]
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|Noun||1.||crackerjack - someone excellent of their kind; "he's a jimdandy of a soldier"|
|2.||crackerjack - something excellent of its kind; "the bike was a jimdandy"|
thing - an entity that is not named specifically; "I couldn't tell what the thing was"