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(FY-rus)
A disease, similar to a virus, that spreads through Social Media and infects both people and memes. In memes, they often cause them to simply become pointless and die, but in humans, it can manifest as anything from stupidity to insanity.
Memonavirus(MemPhID-20) is a highly infectious Phirus that originated on Reddit, lethal in memes but causes a lose of humor and sense of life in humans.
Phirus by Shiori Chiba April 8, 2020
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Word made by Daniel Howell and Philip Lester. At the end of pinof 9, Daniel Howell decided to do a ditty.it meme. One of the main things said in the ditty.it meme was "Show me phat Philussy" which later became a big thing to the phandom.
"Aye man, show me phat philussy."

"Show me phat birthday philussy."
philussy by Phan.Member February 4, 2018
Related Words

Tree Top Pirus/Bloods 

A blood gang that started in Compton (or Bompton) in the mid/late 70s which was popularized by Gangsta rappers Dj Quik (90s) and YG (2014). Estimated to have over 500 members, the Tree top Piru bloods have expanded to Maryland, and has a possible connection to a blood gang in Montreal Canada.
Damn, don't Fuk with that niga, he's in tree top he be bangin' Bompton with the homies. Tree top Pirus/Bloods don't fuk wit us lil homie.
Tree Top Pirus/Bloods by 4hunnid August 13, 2016
It is a word created by Daniel Howell in a video titled 'Some Bloopers From Pinof 9'. This rat decided to take the clip of Phil Lester flipping a bottle off of his ass and turn it into a Ditty meme. Some great people I stan
Dan: "Show me your Philussy"
Philussy by Sophiaisnotcool May 30, 2018

cedar block pirus 

CBP...
a Blood gang located in the west side of Compton, CA...
rapper The Game claims this set...
WestSide Compton Cedar Block Piru Blood Gang
The act of watching too much porn on your computer and getting a virus.
I was watchin the booty slap, and next thing I know I had a major poirus! 50 pop ups for booty slap deluxe in 2 minutes!
Poirus by alstp42 July 29, 2010
Adj. Pronounced Páir-ûn

Phirun is a commonly used Hmong term used to describe a liar or person who embellishes a story.

May also be used to describe a scam or anything fake.
Ex. 1
Damion: I did 500 squats today.
Josh: Okay Phirun... And Cops don't eat donuts.

Ex. 2
Damion: I sent 25,000 dollars to a King in Africa and he's gonna send me an inheritance.
Lauren: That's Phirun you idiot!
phirun by Holly Lawrence February 7, 2014