Top definition
a case of beer (usually cheap, due to its teenage nature) purchased with the intention of drinking during the day, rather than at night (can also be used when describing a case drunk with the intention of Pregaming a party that night). very common on school half days leading into the weekend and the summertime binge that teens go through while trying to make up for the time lost in school. Day cases originated in the philadelphia area, particularly the western 'burbs
Friend: "yo we have a half day on friday, i'm feelin' a day case"
Me: "i'm feelin' 3"

Friend: "It's the first week of summer, we gotta set the mood."
Me: "Day cases on day cases on day cases"
by January 16, 2012
Happy St. Patties Day!
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