A crackerjack box was the disposable cardboard box used to hold popcorn or candy (sweets), though over time has come to mean a similar box or container used to give away rather useless, cheap toys and/or giveaway items. So anything referred to as 'coming out of a crackerjack box' is being derided as useless, cheap or fake.
Did you get your degree out of a Cracker jack box? (ie. your degree in media studies / sociology etc. is worthless)

(From Meatloaf's "two out of three ain't bad"): There ain't no Coupe de Ville hiding at the bottom of a Cracker jack box (you'll never find a valuable and exotic, vintage car in the bottom of a crackerjack box)
by Nigel An'srid December 18, 2016
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A rich white person or stupid white person that keeps staring at you because of what you have if your a person of color
Look at the fuckin cracker jack box over there hating on me, fuckin cracker jack wat the hell you staring at
by Jamesindtown September 15, 2007
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