crackerjack
\KRAK-er-jak\
noun
1. Informal. a person or thing that shows marked ability or excellence.
adjective
1. Informal. of marked ability; exceptionally fine.
Quotes
We have room for but one verse; but it's a crackerjack, the gem of the collection and illustrates how Ardenas can soar when he spreads his pinions and takes a header into the poetic empyrean.
-- William Cowper Brann, Brann, the Iconoclast: a collection of the writings of W. C. Brann, 1898
Origin
Crackerjack is an Americanism that came to English in the late 1800s.
Dictionary.com
