Related Clues:

• Empty-headed
• Easily addled
• Bubbleheaded
• Spaced out
• Out of touch with reality
• Like an airhead
• Like Phoebe on "Friends"
• A little loopy
• Like airheads
• In la-la land (Var.)
• Featherbrained
• Rattlebrained
• Flaky
• Not at all analytical
• Eccentrically foolish