The person who made your latte this morning likely holds a college degree that has nothing to do with being a barista. Nearly 13 percent of 18-29 year-olds can't find work. Even worse, nearly half of all American graduates in 2010 held jobs for which they were overqualified and underpaid. Put simply, they were underemployed. What exactly does it mean to be underemployed and what does that mean for your future?