Top Definition
People who are crazy about "pi" and memorizing the value of pi upto the first 50 digits
1. Crazy Amanda spent all afternoon trying to remember the first 50 digits of pi before going out on St. patty's day incase she gets caught for DUI and questioned. She is one of those Piphanatic!

2. Mike needs to get a life outside of being a Piphanatic and announcing he knows the first 15 digits of pi at the party.
by Kushangel March 14, 2013

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