Twumor 

(n) a rumor circulating on social networking sites such as Twitter. It is similar to a tumor in that it continues to grow until it is addressed and proven or disproven.

"There is a twumor going around that Eminem is dead."

Twumor by Jeremiah175 August 16, 2009

it's not a tumor 

Phrase to be spoken in a terrible Austrian accent after having heard the word "tumor" in any way, shape, or form.

"Thank goodness the tumor was benign!"

"It's NOT a TOO-mah!"

"Look, just shut up."

it's not a tumor by Neilmiser May 5, 2004

Did you have a brain tumor for breakfast?

A phrase made popular by the 1989 movie 'Heathers' and the 2014 musical of the same name. It is very similar in meaning to 'Are you retarded?'.

Heather Duke: Can I be red?

Heather Chandler: Did you have a brain tumor for breakfast? I'm always red

Heather McNamara: I've been looking forward to this all day!
Heather Duke: Did you have a brain tumor for breakfast?

Did you have a brain tumor for breakfast? by ChrisWiltrout December 30, 2016

Trumor 

A rumor that is true

"Did you the rumor about Sarah blowing Dan?"
"Dude that's not a rumor that's a trumor!"

Trumor by Daniel Mcauly October 19, 2013

tumor baby

A C-section baby

Sally: Happy Birthday Tim!
Tim: Actually I'm a tumor baby.
Sally: Sworry, Happy Removal day Tim!

tumor baby by classiccowz February 3, 2018

twomorrows

The day after tomorrow.

Leo is excited because his birthday is twomorrows.
Rami and Joey are meeting via conference call twomorrows.
Twomorrows the new coffee shop is scheduled to open.

twomorrows by MikeInDC July 28, 2020

Advanced Corpse Tumor 

Most intense fucking song ever written. It's by a technical death metal band from Germany called Necrophagist.

The solo in it sounds so fuckin' sweet, it's like classical music on the guitar. Muhammad is one insane motherfucker.

Metallica Fan: OMFG, The solo in ONE is the most orgasmic thing on the planet, and no one else can play it cause Kirk is so fucking awesome and good at the guitar I just had an extreme case of fan-jizz

Me: Bullshit, listen to this *shows him Advanced Corpse Tumor*

Metallica Fan: OH GOD, WHAT WAS I THINKING *cries in corner*

Advanced Corpse Tumor by Muhammad Fucking Suicmez bitch August 11, 2010