crackerjack

US /ˈkræk.ɚ.dʒæk/
UK /ˈkræk.ɚ.dʒæk/
1.

bánh quy giòn

excellent, of the highest standard:

:
•
He has a reputation as a crackerjack operations executive.
1.

bánh quy giòn

something or someone excellent:

:
•
a crackerjack of a novel