experimentally ill 

The state of craziness in someone who has abandoned their guardrails, willing to give anything and everything a try in a desperate bid for attention, changing pronouns before reconstructive facial and genital surgery has started, ingesting any illicit substance in a quest for near-death - say, taking the one-chip challenge three times consecutively - risking it all for a tiktok video, claiming enlightenment and liberty by daylight, shaking with fear in the dark.

"Have you seen the person formerly known as Bob?"
"You mean Countess Madge, aka Tongue-Ripper-Tony? I caught his/her/their 'Travel Guide to Swimming Sewer-Gator Canal with CC' this morning."
"Wudja think?"
"Oh, they've gone full-on experimentally ill, which'll last right up till the parents subscribe to their feed.

experimentally ill by Monkey's Dad September 10, 2023

Experimental Internet Gas 

This is an absolutely baffling term originating from Marvel's New Warrior's comic reboot. The experimental internet gas gave a character called Screentime (a meme-obsessed teen superhero - literally) his special powers after his grandfather made the gas. This is a legit Marvel creation.

What.

"A Meme-Obsessed super teen whose brain became connected to the internet after becoming exposed to his grandfather’s “experimental internet gas.” Now he can see augmented reality and real-time maps, and can instantly Google any fact. Does this make him effectively a genius? He sure acts like it does."

Experimental Internet Gas by Clockwork Caracal March 19, 2020

Experimental MRE 

Military slang for a "sensitive item" (ie weapon, GPS, radio) that has been lost in the field or stolen. Jokingly referred to as an Experimental MRE (Meal Ready to Eat) which are field rations.

Bravo Company lost an Experimental MRE. They're on lockdown until somebody finds them.

Experimental MRE by robocheng December 4, 2013

experimental error 

A mistake made while experimenting.

Jimmy: Shit dude, I shouldn't have touched Steve's sack like that!
Chad: Sounds like you made an experimental error.

experimental error by a big guy October 1, 2015

Experimentality 

where a certain person loves to experiment and try new things, because it sounds challenging, risky, and fun. Especially when it comes to sexual things.

boy: "I bet getting head while driving is fun"
girl: "you want to try it?"
boy: "I love your experimentality."

Experimentality by Rockin'it December 3, 2009

experimental music 

Music that uses non traditional sounds, techniques, compositional elements, or performances.

The record labels Erased Tapes and Mythical Records both release quality catalogs of experimental music.

experimental music by Experimental Music and Art December 1, 2014

experimentalist

Some who tries new and or different experience sexually

A experimentalist couple went to a Subway station and had public sex

experimentalist by The Experimentalist July 31, 2018