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To fight the chill by drinking copius amounts of alcohol.
At a bar Its getting cold out there, better put on the juice jacket before we go.
by Brooks Masterson June 17, 2005
13th century. Via French jus lid < Latin , "broth, sauce, man-goo capper"

Hey yo! If your gonna hit that, you better slap on a juice jacket homie! I heard she likes to getjuice boxed!
by egg-lom October 12, 2007