Noun. A combination of the words: Douchebag, and Starbucks.
One of the many individuals whom you find consistently loitering outside of your nearest Starbucks Coffee.
Douchebucks are known for attempting to dress "trendy", and gravitate outside and around Starbucks for sometimes hours on end. Many speculate as to what these people are really doing, because it's very clear that they're not drinking coffee for six hours straight.
"Hey you! Yeah, douchbuck I'm talking to you. Stop pretending to drink coffee from that empty cup, fold up the laptop, and leave."
"These douchbucks are ALWAYS lurking. I wonder what they are really doing..."