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When you bust your nut solely from stroking your meat between the ass cheeks of your partner. There’s no penetration. Just friction from that ass crack.
I did the old crack jack last night and nutted all over the small of her back.

I did a crack jack last night with no lube. The skin to skin friction was intense.
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by Eaton Holgoode October 11, 2018
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-to hijack someone's game of TriviaCrack and choose the wrong answer
John: Hey! I know that one.
*Takes Ken's phone and answers "50" to the question "How many stars were on the original American flag?" Gets the question wrong.*
Ken: Hey why'd you crackjack me man!?!
by mrmojorising71 December 21, 2014
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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.
by mxxx July 11, 2008
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a word meaning okay;also used for crackhead
maya:do you wanna go to the mall?
by maya April 04, 2003
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