Definitions by Krish the Fish

Pi O'Clock 

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!"

Pi O'Clock by Krish the Fish March 16, 2010