Any half-hearted and
disingenuous attempt by the mainstream to pass itself off as new,
nonconformist, or
anti-establishment.
vb. mainstream ("normal", trendy, majority, conformist, establishment) + steam (to let off steam or relieve pressure)
"GAP is
donating half of the sales
on red items to support
Women's Rights in the Third World!"
"They're just mainsteaming. don't believe that crap."
...
"I went to a hippie festival last month to check out the scene, but I realized I was just mainsteaming. I don't actually understand their deal."
