Pi Is All Booked 

When teachers and students who want to borrow books on the number π from public or school libraries are told that they had all been lent out, probably because the borrowers needed them for their project or presentation on Pi Day.

When the prime minister asked his secretary to help borrow some math titles on pi for his wife, he’s told that “pi is all booked”—all titles are due after March 14.

Pi Is All Booked by Fasters May 29, 2022

Pi Is Sovereign 

When mathematics’s most famous constant π transcends different math topics and disciplines, permeates both art and science, and lays hidden in philosophy and religion, often popping up in the least expected places in nature—the symbol π is a global icon that resonates positively or negatively with peoples of all ages and backgrounds.

Pi is sovereign among dozens of mathematical constants, but God is Sovereign among thousands of gods and goddesses, or deities and idols.

Pi Is Sovereign by MathPlus July 18, 2021

Piiska

Smartest and best looking guy ever seen in Pitäjänmäki or any other area in Helsinki.

This man is no Piiska.

Piiska by Truthfromthewest November 23, 2021

Piism

A popular faith among mostly male geeks or pi zealots, who enter the name in the “other religions” category when filling out a printed or digital form.

At the last census, Piism had made some numerical progress, by breaking the psychological barrier of 3,141 diehard believers.

Piism by Numerati November 20, 2025