Someone, often a bobo or a limousine liberal, who haunts both coasts and ignores what's in between; see red states.
He was so bicoastal he'd never heard of Omaha except in ads for mail-order steak.
by Cornholio October 30, 2003
Having a residence on both coasts of the United States, specifically in the New York City and Los Angeles metro areas.
Me and thousands of other Americans are bicoastal.
by mahcheese August 27, 2008