1. featherbrained - Adjective
2. featherbrained - Adjective Satellite
lacking seriousness; given to frivolity
Source: WordNetThe boys. The beef-witted featherbrained rattleskulled clod-pated dim-domed noodle-noggined sapheaded lunk-knobbed boys. How could anybody accuse her of stealing them? Why would anybody want them anyway? William Goldman
a dizzy blonde Source: Internet
light-headed teenagers Source: Internet
silly giggles Source: Internet