Crackajack /(?)/

Crack·a·jack

Crackajack

n.
  1. An individual of marked ability or excellence, esp. in some sport; as, he is a crackajack at tennis. [Slang]
  2. A preparation of popped corn, candied and pressed into small cakes. [U. S.]

Crackajack

a.
  1. Of marked ability or excellence. [Slang]