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When a person shakes a slurpee like they're trying to get it to cum, just so they can suck it up like a fat kid at a buffet. It's usually when the slurpee is mostly ice and every time they suck, it just laughs in their face.
I did the jack the slurp so hard, my straw got a black eye.
That slurpee was so full of ice, I had to jack it like it was my ex.
Jack the slurp so hard, the ice started a fight with the syrup.