airhead

noun3

1. •
   (informal, offensive) A foolish, silly, or unintelligent person.

   • Yeah. Well, Tammi is a bit of an airhead, I guess, but I feel sorry for her. — 1996
2. •
   An area of hostile territory that has been seized for use as an airbase to ensure the further safe landing of troops and materiel.

   • The initial airhead may in fact be a series of smaller airheads which, after landing, join up in combat structure as mutually supporting in a tactical sense. — 1957
3. •
   A (usually temporary) landing area for aircraft for supplying a non-military operation.