Posers who like something because they think it's cool, or to be "part of the crowd". Lamestreamers are the ones who find out about "cool new music".
I'm always fearful of "lamestreamers" liking my favorite bands. Kings of Leon, Vampire Weekend ARE Lamestream. They are the poster children for Lamestream-ness. Please don't start liking Washed Out.
by Virginia Superwolf June 30, 2011
1 more definition
What every damn dirty hipster calls people who listen to the bands they like without realizing they fit the type.
Unless you were there when the band formed and jammed for the very first time, you didn't discover them, thus you are a lamestreamer you damn dirty hipster.
by EatMeEatMeRaw July 13, 2013