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Something that is so mainstream that pretty much everyone likes it and it becomes lame for that reason.
1. Dude, did you listen to Green Day? That's so lamestream.
2. I didn't want to be lamestream so I started listening to screamo.
by dave "pelirrojo" rogus November 18, 2007
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May 12 Word of the Day
When someone goes to the gym and spends 90% of the time on their phones scrolling through social media
Looks like its thumb day again for Jimmy with his usual routing... 3 sets of 5 snapchat selfies and 10 sets of scrolling through facebook until exhaustion
by Gary br April 02, 2017
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2
A term hipsters use to define something that tries to be hipster and fails by still being mainstream.
Hipster One: Did you see that girl wearing fake glasses?
Hipster Two: Yeah, she's being lamestream.
by IceOfWaterflock May 29, 2013
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3
Things that people participate in or go to because they think it will make them look hip.
Rob: Are you going to Lollapalooza on Friday?

Burt: Dude, Lollapalooza is SO Lamestream!
by Burt Maass March 21, 2008
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