Small foodstuffs brought along on an outing specifically to prevent a companion or oneself from becoming cranky.
Before we left for the market, I stuck a granola bar as a pocket snack to keep my wife from stabbing me when her blood sugar crashes.
by n8ryde March 16, 2011
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A multipurpose snack kept in ones pocket for not only emergency purposes, but for hungover mornings, when you’re high and on the go, and after work shifts when you’re at the bar and they’ve already closed the flat top down.
Pauly: “yo Dom you got any pocket snacks on you?”

Dom: “yeah I got some over in my jacket on the bar”

(Both Pauly and Dom look over at the bar to see someone checking his pockets)

Dom: “HEY! DONT TOUCH MY POCKET SANDWHICH!”
by Naenae42069 March 17, 2019
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