Top Definition
When a man dips his sweaty sack into a cup of salt, making sure the salt sticks, then proceeds to slap his unwitting victim in the open eyes with his sack, causing large amounts of pain to the victim.
Guy 1: "Dude, your eyes are extremely red!"

Guy 2: "Yeah, my brother gave me the Salty Jack last night 'cus i ate his last cookie."

Guy 1: "Ouch."
by Lawlwut? February 11, 2010

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