half-jack

half-jack

n
(Brewing) informal South African a flat pocket-sized bottle of alcohol
[C20: jack, probably from C16 jack a leather-covered vessel, from Old French jaque, of uncertain origin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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