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1.
That wonderful time of day where it becomes necessary to pack up a fat bowl. Usually performed After some sort of activity (Work, class, homework, snowboarding etc.)
After a long day at work..
Steve: Yo man what time is it?
Jim: Why it's Bowl O'Clock of course!
Steve: Bowl O'Clock it is! Pack that shit!
by S T Thrizzle April 18, 2006
 
2.
That wonderful time of day or night when it becomes apparent that it it time to smoke a bowl.
Steve: Hey guess what time it is!
Jim: it must be BOWL O'CLOCK!
Steve: Bowl O'Clock it is!
by S t tothe mothafuckin 3 April 09, 2006