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when people dress to avoid mainstream fashion but associate with others who dress with similar intentions. when they congregate in large numbers their alternative appearance becomes the norm.
billy: we should go to that underground club dressed in smart casual.
jim: the club were everyone is dressed crazy to show they don't conform and are hip?
billy: yeah, but they all end up looking the same and negating their wacky fashions.
jim: they're totally altstream.
altstream by thoja721 February 15, 2012
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Anistream 

A website and mobile app.
Anistream provides anime without advertisements for no cost.
There is absolutely no catch.
The new Demon Slayer episode is out,
I can't wait to watch it on Anistream
Anistream by Herobrine's ghost September 20, 2019
Related Words

Maltstream

Adjetive used to describe either a band, celebrity, or person who often describes itself as "alternative", but usually watch MTV and go shopping at American Eagle Outfitters.

Comes from the next equation:
Mainstream + Alternative = Maltstream
Radiohead, Muse, Phoenix, and Vampire Weekend are so maltstream, you better listen to some GIRLS album
Maltstream by alaskaneyes March 7, 2010

AFLStreamer 

A guy who thinks he has content but in reality doesn't.
Did you watch AFLStreamer's stream yesterday? No? Neither did anyone else.
AFLStreamer by Fredu January 6, 2022
Spidey sense for evading poop on the street, canine or otherwise.
When walking in NYC or LA, you need shitdar.
Shitdar by Sickomonster June 3, 2026
Word of the Day on June 6, 2026

Shackteâu

A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.
Shackteâu by ez-dog June 4, 2026
Word of the Day on June 5, 2026
Sonion comes from a GIF that is a mix of the word son and onion ( if you use this slang you like dih)
Man 1 says "I drank last night I need a break" Man 2 "Sonion"
Sonion by popularloner67 March 11, 2026
Word of the Day on June 4, 2026