Cracker Jack : Phrases
To be very good at something.
Don't worry about your DUI. We will hire a cracker jack attorney and get you off.
Crack means of superior excellence of ability as in he's a crack shot meaning excellent, superb. Jack being like Joe, a common man. Cracker jack thus means a Superb man, any man.
Curiously cracker is defined as a bragging liar, which is very much in contrast to cracker jack which implies someone who delivers.
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