Top Definition
The time 3:14. Can be AM or PM. Also, Pi Time.
Guy 1: "Hey, what time do you want to go to the bar?"
Guy 2: "I have class until 3. Let's go at Pi O'Clock."

Pizza Place: "Your pizza should be ready to pick up at Pi O'Clock. Thanks!"
by Krish the Fish March 16, 2010
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