Hutch:
As Vice President of The Villages Airheads, I am very happy to see your proper definition of an Airhead!
Small point: we prefer to be capitalized, as above; it signifies that we are to some degree important!
Some folks insist that, being airheads, we must be flaky, or weird, or unstable, or fools, or someone less than bright. Such definitions are probably equally as valid, in the long run, as that most of us use supplemental oxygen!
SWR