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A day which consists of eating pesto pasta, watching youtube and playing fortnite. The intention is to be productive and work but realistically, it never happens. People who indulge in jason days are usually greek or have greek connections (i.e. a greek house mate)
Luke: Hi Jack, what is your plan for the day?
Jack: Alright Luke, probably going to have a jason day I haven't had pesto in a while.
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by ilikeherbutshehasboyfriend March 12, 2018
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