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Obsidian 

In the realm of hard rock and heavy metal music, to be Obsidian, a band must straddle the line between rock and metal, while having psychedelic, occult, & doom elements.
Uncle Acid and The Deadbeats, Jex Thoth, and Blood Ceremony have all, at one point, been Obsidian.
Obsidian by Xenos Nassar August 6, 2012

obsidiot 

Those who are amongst the ranks of Fallout fans who believe New Vegas is the be all-end all of the series, and will venomously, and maniacally defend their stance with the ferocity of Chricj Crocker defending Britney Spears while screaming into a webcam. These neckbeard adorned cock goblins are also known for screaming "drones " before launching into a badly spelled rant that you have to struggle up understand.
Matt: Holy shit, Tony's such an obsidiot.
Kevin: That emo kid needs to wash his hair.
obsidiot by SoulSurvivor23 September 23, 2017
A thing Danny said in Stampy Seed Survival Episode 18
Wow Obsidine makes Danny use dan_turnedon
Obsidine by KazUwU March 19, 2020

Harder than obsidian 

Your man when he sees Pieck Finger
Her: You’re harder than obsidian!
You: I just watched a Pieck Finger edit, wanna roleplay?

Black Obsidian 

A code name for a female named after a crystal
Friend: “Did how did your date with black obsidian go.”
Friend 2: “Good!”
Black Obsidian by Brickroadhouse November 23, 2022
obsidious adjective. rare. from Latin obsidium siege, from obsidere: see OBSESS, -IOUS. Besieging; besetting, siege like, besiege, unrelenting, attempt to overpower, an extensive period of misery.
With his relentless obsidious nature, he would not let up until he conquered all before him.

The misery he endured was truly obsidious.
Obsidious by Obsidious August 2, 2009
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
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