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

The Pi in Me

When there is a hidden element of π residing in all humans (or maybe even animals), whether they know it or not, regardless of their experience of school math—that pi-mind consciousness that intuitively seems to be guided by some Higher Being to convey new insights about the “sacred number” to humanity or any living entity.

When someone puts themselves in a Zen-like or transcendental state, the chances of them experiencing “The pi in me” aha! are higher than when they’re constantly being bombarded with a deluge of sensory input.

by Numerati March 22, 2025

Person Pi

Due to being an irrational number, Person π is irrational, everyone that doesn't have a regular number in them is either irrational or not irrational at all

Person i: I'm back to destroy the average Urban Dictionary user's brain to make them make definitions of words composed of things about sex!
Person Pi: 3.1415926535897932384626433832795028...
Person i: They have already done that themselves apparently...
Person e: 2.718281828459045…
Person i: CAN YOU GUYS SHUT THE F-
Person ɸ: They can't, they're too dumb

by Dalmut Brothers September 8, 2024

Pi

Something you can add to the end of your words, to give it a tone that you like it (unless it’s their name.)
Origin: bapi

“omg sun-pi (sunoo) is so cute!”
“by-pi taw-pi”
you write it without the -‘s but otherwise i can’t post it

by viktorinmiddels July 17, 2022

Pulling a Pies

Being poor in a game or in real life

Viceninja5 is pulling a pies and being poor.

by CasualWhy May 8, 2021