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Not canon; not official.
A theory and headcanon can be considered canon by an individual, however, not by the creator and therefore uncanon.
"Dude, it's just a theory, it's uncanon."
"Why is my ship uncanon?!"
uncanon by Starfondler May 5, 2018
Urban Dictionary Merch
Another word for unbelievable.
It’s so bad that it’s unbelievable, uncanon
I hate cheese so much that it’s uncanon”
uncanon by Bluecv February 4, 2018
Word of the Day on February 6, 2018
Adjective

1) To be lacking in Nick Canon like qualities.

2) Boring, not entertaining.

3) Failing at attempted humor - severely.
“Nobody watches that weak ass show because it wasn’t phunny and it was completely uncanon.”
Uncanon by Phuckin' Phylean February 6, 2018
Something that describes another thing as not canon. More specifically, something that has absolutely never happened in the plot.
Person 1: "According to this fanart, this scene is canon."
Person 2: "We must not be watching the same show, this is uncanon and you're using fanart as a source.."
uncanon by Gerrant November 17, 2021

Uncanny Valley 

First theorized by Japanese roboticist Masahiro Mori in 1970, the Uncanny Valley basically states that the closer a robot or other nonhuman entity gets to resembling a human, the more humans will like and empathize with it.

However, there is a point in development where humans instead become strongly repulsed by the barely-human robot/entity. Fortunately, this effect fades as the robot/entity becomes less distinguishable from a human.

Although hotly debated, the theory is present in many sci-fi movies and the like, and has been used to explain people's reactions to some computer generated characters.
I can't get into "Rumble Roses" because the girls just don't look quite right to me. I guess it's the Uncanny Valley at work.
Uncanny Valley by Civan August 6, 2006

Mr. Incredible becoming uncanny 

Mr. Incredible becoming uncanny is a meme containing dark humor involving a Pixar character "Mr. Incredible". The meme contains Mr. Incredible's face, getting unhappier (also known as "getting uncanny") and darker as the background music becomes more disturbing. Fans of the meme claim there are 10 phases in the original version.

There is an extended version of the meme, which contains over 22 phases. The extended version contains graphical imagery which may not be suitable for young children.

Then there is "Mr. Incredible becomming canny" which is the exact oposite of the original meme. The meme still involves Mr. Incredible, this time he is becoming happier (or "canny"), which contains 10 phases.

The full extended meme contains all three versions of the meme; original uncanny, extended uncanny and canny.
Dave: "Hey have you seen the Mr. Incredible becoming uncanny meme?"
Cody: "Yeah, it's pretty weird"
Dave: "I pretty much like it!"
Peter: "Yeah me too!"

Mr. Incredible Becoming Uncanny and Canny at the Same Time 

This is like the fusion sequel of the meme Mr. Incredible Becoming Uncanny where Mr. Incredible progressively becomes more and more traumatized and ascends simultaneously, which can lead to him becoming potentially insane both inside and outside the mortal realm and the universe itself.

The meme has reached the point where people fusing the same level of phases of 2 versions of Mr. Incredible Becoming ??? Memes combined to uniquely milk the meme. This form of the Mr. Incredible meme is only used in template-like formats.
Has the meme died yet?

Nope, there's Mr. Incredible Becoming Uncanny and Canny at the Same Time, giving more people ideas to uniquely milk the meme
More from Urban Dictionary
A group of people, typically women, searching through someone’s digital footprint in order to find more information about that person.
Susie wasn’t sure if her new Hinge match was a creep, so she assembled Galantir and they found out he used to post slurs on gaming forums.
Galantir by Ge-sus September 22, 2026
Word of the Day on September 23, 2026

murderhobo 

In a tabletop game, a murderhobo is a player who murders NPCs indiscriminately. This is normally derogatory, referring to a player who totally ignores quests, dialog, backstory, trade, world building etc.

The term is most common with Dungeons and Dragons, but it can be applied to most RPGs where the player is allowed to kill most quest-giving NPCs and NPC traders. E.g. Elder Scrolls, Fallout, Divinity original sin.
DM: The sad little orphan girl tugs at Steve's trenchcoat to get his attention, and ask for help saving her pet dog from...
Steve: I'd like to roll a strength check against strangling the orphan.
Dave: I call dibs on the dog.
DM: You murderhobos disgust me.
murderhobo by Loup&S September 9, 2021
Word of the Day on September 22, 2026
In sales terms, a whale is a prospect that is significantly larger than an organization’s average customer.

Whales are large and extremely difficult to close. Due to their immense size, they are highly sought-after.

A whale is typically identified at first by a whale hunter on the sales team, but often requires cross-discipline participation in order to close; this includes assistance from operations, engineering, creative, client success, and business development teams.
"Shit...the sales director chewed me out on the sales call this morning. He's totally pissed that I have nothing in my pipeline. I've been focused on this one whale for so long that I haven't had time to prospect for normal-sized deals."
Whale by FQ_GFY February 3, 2020
Word of the Day on September 21, 2026
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