kippers
 n.pl.— «The United Kingdom calls them kippers, short for “Kids in Parents’ Pockets Eroding Retirement Savings.” The United States refers to them as “boomerang babies.” And this year, 64 percent of 2004’s college graduates in the United States join the ranks of adult children returning to live at home» —“When children come home to roost” by Marshall Loeb Daily News (New York City) July 9, 2004. (source: Double-Tongued Dictionary)