borat creates this humerous moment. merely a cathphrase consisting of 3 words, "who is jack?" can be said in a various amount of situations, all equally as humerous.
1.*man with car jack* And this is the car jack
*borat/you*yes... and when will jack get here?

2.*man with bowling jack* you must roll the jack.
*borat/you* ah ok, so who is jack?

3.*man with jack* hello, meet jack.
*borat/you* lik the jack nicholson? "i hold up the bank"
by derrty_harry April 14, 2005
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A slang term in NYC

It means "What gang do you affiliate with?"

usually used by drill rappers or gang members
Kyle Richh: Ayo jenn who you jack
Jenn Carter: 41K Smokin on Notti
by zincity22 January 23, 2023
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