10. A brief time; an instant; as, to be with one in a crack. [Eng. & Scot. Colloq.]

11. Free conversation; friendly chat. [Scot.] What is crack in English . . . Acrack . . . a chat with a good, kindly human heart in it. P. P. Alexander.

CRACK
Crack, a.

Defn: Of superior excellence; having qualities to be boasted of.
[Colloq.]
One of our crack speakers in the Commons. Dickens.

CRACKAJACK
Crack"a*jack`, 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
Crack"a*jack`, a.

Defn: Of marked ability or excellence. [Slang]

CRACK-BRAINED
Crack"-brained` (-brnd`), a.