For the moment we are the bicycle, and not the feather-brained cyclist.
"She was feather-brained," continued the bon vivant, with a blas shrug.
Spinoza had nothing but contempt for facile-tongued, feather-brained Utopians.
He's one of your feather-brained, lily-livered fellows, is he?
Darzee was a feather-brained little fellow who could never hold more than one idea at a ...