Pi sack 

3.14 grams of Marijuana. Usually purchased by people who want to get higher than a dime can take them.

Fellow one: hey hey, can you divide my circumference by my diameter?
Fellow two: sure thing cheese dick, that'll be eleven bucks for the pi sack.
Fellow one: Hot damn!

Pi sack by jolly green gangster December 25, 2006

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

pi-fi 

n. pirated wi-fi

We moved into the new place, and we could totally get pi-fi in the kitchen.
Tom is a chump, he's paying Comcast even though he can get three bars of pi-fi.

pi-fi by johndoe898 October 20, 2008

Pi'erre Bourne 

Pi'erre Bourne is a 27-year-old rapper, producer and engineer, who is known for producing Playboi Carti's hit song, "Magnolia". He has also produced for rappers such as : Kanye West, Lil Uzi Vert, Chavo, Young Nudy, K$upreme, UnoTheActivist, Gunna, Trippie Redd, Lil Yachty, Travis Scott, Chief Keef, etc.

He also is a rapper, and is known for his The Life Of Pi'erre 4 project, and many more other albums under the "TLOP" serious

Pi'erre Fan 1: "Did You heard how good Pi'erre Bourne's production was on TLOP 4?"
Pi'erre Fan 2: "Yeah, Pi'erre is up there, for real."

Pi'erre Bourne by thouxanbangels February 27, 2021

pi day 

Sorry, but the "true" math geeks are waiting for March 14, 2015 at 9:26 and 53 seconds AM to celebrate. Until then, we'll keep our differential equations and T-distributions to ourselves.

We who celebrate Pi day don't get out very much.

pi day by Jeff42 March 15, 2007

Pi Time 

The time of the day where a digital clock reads 3:14.

Dude, what time is? Dude, it's pi time.

Pi Time by DOAREK July 28, 2009

Pi-nis 

A penis that is exactly 3.1415... inches long, or the value of the number pi.

Sleeping with my math teacher was disappointing as he had a pi-nis.

Pi-nis by meowlnir June 30, 2016