A blend of murky and marketing, murketing has two parts. The first refers to the increasingly sophisticated tactics of marketers who blur the line between branding channels and everyday life. ... The other half of what murketing means is found on the consumer side of the dialogue. ...More and more people of all ages are, in a variety of ways, actually participating in new forms of marketing, from signing up with "word of mouth" firms to spread the news about some new product the firm represents or submitting their own home-brew advertisements on behalf of well-known consumer brands.
--- Rob Walker, Buying In: The Secret Dialogue Between What We Buy and Who We Are, 2008