What is Pack Your Shit?
1.
The universal signal given by a friend/acquaintance when they've screwed up or broken the law in such an irreconcilable manner that the best solution is to leave town together. "Pack your shit" is the frantic and imperative way of instructing to pack a suitcase of clothes and essentials.
Person A: "Pack your shit!"
Person B: "What? Why?"
Person A: "I just killed a hooker!"
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2.
To pack s. o.'s shit is to fuck someone up the ass. Such as in
We can be friends . I don't care if you are a queer. Just don't ask me to pack your shit.
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