Sentence:  An estimated $75 billion worth of food is thrown out yearly in America, and it doesn't take a great leap of logic to connect the desire to live sustainably with the almost limitless supply of free food that overflows the nation's dumpsters. Thus the <WSD>opportunivore</WSD> can forage either overtly or covertly, by asking up front or diving out back. 
Meaning of the word marked with <WSD> tags:  A person who subsists on still-edible food that has been or was going to be discarded.