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A covert supply of a regionally-specific food product or sundry commodity, carried for substitution in a public setting outside of the region of origin
"Why's that lass rootling around in her hipster nap sack?"

"Don't worry, old boy: she's turned her nose up at the range of teas on offer but she'll be alright. She's carrying her Yorkshire supplies."
by Redbenches September 30, 2013
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