When something is popular enough to be mainstream, but is really only mainstream for white people. Emo music is a good examle of whitestream.
Anup: Hey did you know snoop dog just had a show in town?

Tammy: Oh I loved him back in high school- that's too bad I missed it

Anup: It was good, the audience was almost entirely white people though-it was a little strange

Tammy: Yeah, I had heard he's really gone whitestream recently.
by schmuckaneers June 6, 2009
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