What is the definition of Stays Weapon?

A 'tays weapon' is a dude who's so incredibly skilled in using a particular weapon that he's turned it into a life-saving tool, but still manages to keep it locked away like a secret superpower. It's like he's a walking, talking, and surprisingly quiet version of "The Terminator."

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Here's an edgy example sentence: "In the post-apocalyptic wasteland, Jack, the 'tays weapon' who can blast anything with a well-placed pickaxe, keeps his trusty rusty old shotgun safely stashed away, waiting for that inevitable 'evil villain' who's decided to take over the place."