PI

PI is short for the Philippine Islands. Philippine Islands is the old name of the Republic of the Philippines. The Philippines was formerly known as Las Islas Filipinas, named after King Felipe II of Spain, when it was a colony of Spain from 1565 to 1898. Then it was Anglicized and it became known as the Philippine Islands when it became a U.S. territory shortly after the Spanish-American War of 1898. In 1946, upon independence from the U.S., it became a republic. The name of the country was then changed to the Republic of the Philippines.

Yo, I’m going back to the PI next year.

by The real Juan de la Cruz September 28, 2022

Pi Pa

A creepy ass grandpa, the type of grandpa that doesn't care about incest and talks like a smoker. Gets mad about everything and is horny all the fucking time.

"MOM!! Pi Pa is having the cat lick milk off his dick again!!!"

by traptears February 28, 2016

Predictive Pi

When both mathematicians and AI could forecast new mathematical results on the number π based on published papers and from recently awarded pi-related research grants.

Predictive pi has somewhat democrarized previously secretive research conducted by both pure and applied mathematicians around the globe.

by Numerati August 19, 2025

jean pi

A big dick.

Girl 1: Wow this guy has a big dick!
Girl 2: Oh that's obviously Jean Pi!

by branlix2000 June 6, 2017

Tai Ji and Pi

When the practice of Tai Ji (or T’ai Chi) could metaphysically or transcendentally propel someone to experience an aha! on the number π.

Speaking to a group of Buddhist mathematicians and math educators, a Tibetan lama challenged his audience to explore the mutual benefits of Tai Ji and Pi.

by Fasters January 25, 2022

Pi

A number that is 3.1415926535897932384626...
You can memorize the first 50 digits and then say you know hundreds because people get bored of listening to you say numbers.

You: I know 200 digits of pi
Friend: Show me
You: 3.141592653589793238-
Friend: Wow
You: That wasn't all of them
Friend: I don't care

by Ranger Russet January 15, 2024

A Pi-Free Math Book

The mathematical equivalent of a meeting-free day or passport-less travel. When the sight of the symbol π is enough to trigger panic or paranoia among billions of folks worldwide, who think they weren’t born or blessed with the “math gene.”

Just as a math book without equations or formulas could raise the sales figures by a few folds, a pi-free math book could give thousands of math-anxious folks more confidence in picking up a pop math book without feeling unduly stressed.

by Numerati January 2, 2025