What is Crackjack?
1.
(Crr-Ack-Ja-Aack)
Noun.
Refers to someone rediculously immature,stupid,or just plain out retarted.
Dude we went to chruch with my girlfriend and my brother was acting like a total "crackJack",I was totally ruined.
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2.
a word meaning okay;also used for crackhead
maya:do you wanna go to the mall?
anna:crackjack!
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1.
when a male's penis is half excited or simply half hard. the awkward stage before a full erection.
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1.
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