Mainstone

European custom.

Also used as an exclamation meaning "cool" or "rad".

"I gotta go check on Mainstone guys."
"Fuck off."

"Did you see Sarah?"
"Yeah, her top was so mainstone!"

by Smoothbrain420 October 25, 2023

Mainstream Media

A scare tactic

Which scare tactics do you have? I have mainstream media!

by ErikTheEliminator151 March 18, 2024

Mainstream Media Fallacy

The erroneous assumption that ideas, aesthetics, or opinions are inherently superior, correct, or more "authentic" simply because they are amplified by or aligned with dominant cultural institutions (corporate news, major studios, popular influencers). It conflates prevalence with validity, market share with truth. Conversely, it can also manifest as the inverse snobbery of automatically rejecting anything mainstream, but the core fallacy is granting automatic epistemic authority based solely on broadcast reach.

Example: "You think that indie theory holds water? Please. It's not on CNN or the NYT Bestseller list. If it was really important, it'd be everywhere—that's just the Mainstream Media Fallacy in reverse." This implies truth is democratically determined by airtime and that marginality, in either direction, is a marker of falsehood.

by Dumuabzu February 3, 2026

Mainstream Bias

The unexamined tendency to believe that ideas, aesthetics, or sources of information are more valid, credible, or important simply because they are amplified by dominant cultural institutions (corporate media, major publishers, blockbuster studios, top-charting algorithms). It conflates prevalence with quality and popularity with truth. This bias creates a feedback loop where mainstream ideas get more attention because they are mainstream, making alternative perspectives seem fringe by definition, not by merit.

Example: Dismissing a groundbreaking scientific paper because it was published in a specialized journal and not on the cover of Nature or Science is Mainstream Bias. It assumes that the gatekeepers of prestige are infallible arbiters of significance, potentially missing revolutionary work that hasn't yet been blessed by the establishment.

by Abzugal Nammugal Enkigal February 4, 2026

Mainstream Neutrality Bias

The assumption that ideas circulated by mainstream institutions—major media outlets, established publishers, popular platforms—represent a neutral middle ground between fringe extremes. The Mainstream Neutralist treats the Overton Window as if it were reality itself, rather than a socially constructed range of acceptable debate. They forget that today's mainstream was yesterday's radical fringe and will be tomorrow's obsolete relic. The mainstream isn't neutral—it's just where power has currently settled.

"I just read the centrist newspaper—they're not biased like those crazy partisan sites," she said, unaware that her "centrist" paper had an editorial board, a corporate owner, and a demographic of readers whose interests shaped every story. Mainstream Neutrality Bias: when the middle of the road is still a road, built somewhere, going somewhere.

by Abzugal Nammugal Enkigal February 22, 2026

Mainstream Downstream

An adjective to describe a band or a brand that is not regularly mainstream, but it is mainstream for alternative people.
msi

A: Have you heard of this band? It's so good!
B: No? That is the most niche band ever!
Later
A: I'm listening to this band. Have you hard of this?
A's friends: Dude stop listening to that NPC music, and get a unique personality
A: This band is mainstream downstream.

by hellohellohellohellohellohell0 February 25, 2026

maintag

(on tumblr) tagging your fandom or a character so that any other fan can see your post
usually used by smaller blogs who arent mutuals with many in that fandom, so the post is like talking to your one spam liker. however, maintagging opens a much larger audience (which usually makes people nervous)

i maintagged my opinion this time

by coriolanussnow12345678943 February 10, 2025