iConversion 

The act of transitioning from Android to Apple devices. Most commonly led by ditching your Pixel 4 (or similar) and purchasing an iPhone 12 Pro. This transition is often acompanied by purchasing Apple Watch, iPad Air and other related accessories. The most advanced version is also leaving behind Windows for macOS.

My iConversion began when my boyfriend tricked me into buying an iPad.

iConversion by IConverted December 22, 2020

Negative Reality Inversion 

A Negative Reality Inversion (NRI) a term originating from the series "The Young Ones" and is actually technobabble.

A Reality Inversion would be the symmetrical inversion of reality. Making it negative would actually cancel it out, leaving you with reality.

NEIL: Anybody watching that must've thought it was a negative reality inversion.

*A man and woman are making out in the shadows
WOMAN: Cor, that looked just like a negative reality inversion, didn't it?
MAN: Yes, it did, a bit.

*They turn their attention back to each other

Negative Reality Inversion by DecoyDucky May 4, 2010

Swanson Conversion

The third stage in the Aerobic Respiration.

Guy #1: Bro we learned about the Swanson conversion in biology today, it's great.
Guy #2: ...

Swanson Conversion by Jvshangold January 9, 2017

ANAL-CRANIAL INVERSION SYNDROME  

A chronic condition by which the physical connections between the buttocks and head are reversed, causing fecal material to spew from the mouth. Conventional treatments include wiring the jaws shut or the prompt use of a gag ball.

ACIS is more harmful to those coming in contact with the ACIS person than the ACIS person him/herself. Even casual contact results in looks of disbelief, screaming and the uncontrolable urge to place one's hands over one's ears and yell "Make it stop". Family and friends living with an ACIS patient are advised to wear ear plugs, or in more extreme cases, to drive shiskabob spears through their ears.

Not to be confused with having Head-Up-Assitisis or Asshatoses.

President Bush displayed symptoms of Anal-Cranial Inversion Syndrome at his last interview when he spoke about his legacy.

ANAL-CRANIAL INVERSION SYNDROME by radfringe December 20, 2008

cranial rectal inversion 

The act of having your head up your ass.

"Are you really that stupid? You must be suffering from a cranial rectal inversion. What a dumb-ass."

cranial rectal inversion by BRAUCHWURST April 19, 2003

Conversion Therapy 

Because nobody else actually gave a definition, opting instead to give their opinions, here's the definition I found on Wikipedia:
"Conversion therapy is the pseudoscientific practice of trying to change an individual's sexual orientation from homosexual or bisexual to heterosexual using psychological or spiritual interventions."

Conversion Therapy is indeed a form of brainwashing, but people should know the full definition, not just that it's bad.

Conversion Therapy by NothingBetterToDoToday March 13, 2019

Conversion Van 

A full-size van, usually with a completely re-done interior and some external modifications, all of which are done by a company who buys the van new and then re-sells the vehicle to consumers. These add-ons can include everything from blinds to a tv. They almost always have a fiberglass roof that is taller than stock, to make head room and add room for the tv. Many of these vans come stock with middle row seats that rotate, and a back seat that folds into a bed. There are many other great things about conversion vans too.

My friend has got a Honda Odyssey, which has a V6, a TV, lots of storage, and automatic doors. I have a Chevy G20 conversion van, which has a V8, is rear wheel drive, has a TV, even more storage, tons of leg room, and automatic doors are for sissies.

Conversion Van by b7bbq April 2, 2009