The latest thing among America's black youth. It was invented sometime in January 2012 and it caught on like wildfire immediately thereafter. Or researchers have tried to find an origin source for the term, and have failed. We believe that it means to be unreasonable, but that is only a guess. The words "extra" and "out" have nothing to do with being unreasonable, but stranger things have happened in the black community. (See swagadactile, swagahoe, Swagafucked, and Swagamemnon) It's unexplained and overnight proliferation is not unlike that of swag.
"Ay why u gota be all extra'd out tho."
"Mayne she all extra'd out."
"Mr Johnson why u gotta be all extra'd out?"
"Ay ay ay ay u extra'd out tho young money swag basedgod knawmeen muthafucka y tho like."