English

Noun

bubblehead ‎(plural bubbleheads)

1. (slang) A stupid person.
   • 2004, David Mitchell, Cloud Atlas

     I rather enjoyed it, but my niece said Audrey Hepburn was a “bubblehead”.

2. (slang) A submariner; bubble-head.
3. (slang) A navy hard hat or salvage diver (inspired by the shape of the old spun-copper diving helmet).

Synonyms

• (stupid person): airhead