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The celebration of April 20th and the previous 8 days. Typically the amount of chronic smoked is increased until 4/20, when one smokes massive amounts of cannabis sativa all day.
Stoner 1: So dude, what u been up to lately?

Stoner 2: Celebrating the 8 days of chronica man, what else? 4/20 is in 4 days!
by Ganjalicious April 15, 2010
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