BOOMERANG KIDS. GROWING-UPS. FAILED FLEDGLINGS. Young adults who live with their parents have been called not-so-nice names over the past decade or so. Along with being somewhat derogatory, they don’t provide an accurate picture of this complex and growing social trend. According to a Pew Research Center report from last year, 15 percent of Millennials aged 25 to 35 were living in a household with a parent as of 2016. That percentage is higher than Generation Xers in 2000, late Baby Boomers in 1990 and the Silent Generation in 1964.