freegan

"People are strange."
Jim Morrison

"America the Over-Stored," by Daniel Gross, Newsweek, Feb. 25, 2008:
"Working 60 hours per week and chasing job promotion 'for the sake of buying the latest crap off the Sharper Image store shelf is no way to live,' says Adam Weissman, spokesperson for freegan.info. (Hey, dude, one might say the same about diving into Dumpsters in search of day-old bread and discarded futons.)"

Disclaimer: I'm storing this piece on my PWNED!! list because I like it as an example of funny writing, not because it reflects my opinion one way or another.

NYT article, June 21, 2007:

"...the term derives from vegans, the vegetarians who forsake all animal products, as many freegans also do...Freegans are scavengers of the developed world, living off consumer waste in an effort to minimize their support of corporations and their impact on the planet, and to distance themselves from what they see as out-of-control consumerism."

I had always thought that it was the latter definition.

Free + Vegan - could be one who will eat vegan food IF it is free, or one who is Vegan but prefers finding free food (I ran across the term amongst some hippies in college and never really got clarification on this point). See also opportunivore, trustafarian and drainbow.