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-Fi 

People call this Mi-Fi, but it is wrong. Pi-fi is your portable wifi, also known had your hotspots but usually it is a device that is mobile.

"Do you want to use my M-iFi?" said Mark
"What that's? " said John
"Its my portable wifi." said Mike

"You mean Pi-Fi, dummy." said John

Pi-Fi by Self-Educated Doctor January 21, 2021

Pi on Fire 

When the number π is so proactive and paranoid in marketing herself so that she would constantly remain in the mathematical consciousness of mathematicians and math educators, while making herself conspicuous in the eyes of the lay public to be part of popular culture.

To avoid being disrupted or eclipsed by other mathematical constants, all vying to get the attention of the mathematical brethren, it’s not surprising to witness pi on fire 24/7/365.

Pi on Fire by Fasters September 18, 2022

The Five Senses of Pi 

Hearing: Your ears can listen to the musical digits of the seemingly random pattern of the decimal number π as they are being recited.

Smell: Your nose can scent the fragrance or sweet aroma of the digits of the transcendental number π.

Sight: Your mind’s eye can see at a glance the entire beautiful landscape of the real number π.

Taste: Your tongue can savor the different flavors of the digits of the sacred number π.

Touch: Your skin can feel the different sensations of the digits of the normal number π, when it is truncated to a certain number of significant figures.

Guesstimate how many autistic people or idiot savants around the world could experience at least one of the five senses of pi.

The Five Senses of Pi by MathPlus September 19, 2021

PiFi 

(Rhymes with Hi-Fi) Stands for a "Pheremone Induced Flirting Incident"
Originated in Iowa City and Germantown, MD.
After having great sex with your man, (or woman), you go out and are getting random flirting from all over the place. You are sending out the "scent" or "signal" to everyone around you.
Sometimes the effect goes on for days...

"I was at the mall and got a major PiFi from the guy behind the counter." "I was in a meeting and the woman across from me was sending me PiFi's."
"I got a PiFi email from my boss today asking me to lunch"

PiFi by Scarlett1218 April 20, 2007

Pifi 

Kim Kardashians Dads name for a big shit

Sometimes I drop hints that I’m around like when you hear someone make a big pifi. Or when you make a big pifi.

Pifi by hurensohnrapper0-9 January 11, 2021

pifinity 

A huge number that starts with 314

it does NOT have a decimal point between 3 and 1 which makes it bigger than Pi-infinity

I love Jeff Pifinity times more than he loves video games.

pifinity by Hillary (math expert of her relationship) June 2, 2008