crackerjack

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

noun

a person or thing that shows marked ability or excellence.

adjective

of marked ability; exceptionally fine.

Origin of crackerjack

1890–95, Americanism; earlier crackajack, rhyming compound based on crack (adjective); -a- as in blackamoor; jack1 in sense “fellow, buddy”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012