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1.
The act of using breast cancer to guilt consumers into buying a product which, if it had not been for the advent of aiding the cure for cancer, they would not have bought.
KFC: Together we can make the largest donation in Komen history.

Consumer: Stop pinkwashing me, you fuck-head! Why wouldn't I just donate money to breast cancer if I wanted to?! Everyone knows you benefit more than the cancer foundations!
by SpaceMouse April 16, 2010
 
2.
the use of breast cancer by corporate marketers in which companies promote their products with claims to donate a percentage of proceeds to the cause
I'm so sick of of every retailer pinkwashing so that I'll by their pink merchandise - what if I hate the color pink?!
by Erin1234 January 06, 2009