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Approximately half an hour after caffeine o'clock, at which point a visit to the bathroom is commonly required.

Often a forgotten consequence of caffeine o'clock, half past caffeine tends to become pressingly apparent to the victim at a most inconvenient time.
Supervisor: Where do you think you're going? You just had your coffee break half an hour ago!

Victim: Yes, which makes it half past caffeine! Oh god!
by archangel62 May 28, 2009
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