bubblehead
n.— «Drivers are divided into “incredibly nutty drivers” and “incredibly wacky drivers” with names to match—such as “Commodore Bubblehead,” who “seems to have spent a little too much time bumping his head on the hatchways in the submarine service.”» —“Harboring Liberty In Pursuit Of Happiness, Visitors Find Bean Town Full Of Revolutionary Ideas” by Katherine Calos Richmond Times-Dispatch (Virginia) July 5, 1998. (source: Double-Tongued Dictionary)