crackerjack

[ krak-er-jak ]
/ ˈkræk ərˌdʒæk /
Informal.

noun

a person or thing that shows marked ability or excellence.

adjective

of marked ability; exceptionally fine.
Also crackajack.

Origin of crackerjack

1890–95, Americanism; earlier crackajack, rhyming compound based on crack (adjective); -a- as in blackamoor; jack1 in sense “fellow, buddy”

Example sentences from the Web for crackerjack

British Dictionary definitions for crackerjack

crackerjack
/ (ˈkrækəˌdʒæk) informal /

adjective

excellent

noun

a person or thing of exceptional quality or ability

Word Origin for crackerjack

C20: changed from crack (first-class) + jack 1 (man)