birdbrained

Silly and frivolous; empty-headed.

Adjective

  1. Silly and frivolous; empty-headed.

    Synonyms: crackbrained addlebrained addlepated airheaded bee-brained beef-witted beefheaded beetle-headed birdbrained blockheaded Boeotian boneheaded boofheaded braindead brainless bubbleheaded buffle-headed bullet-headed cerebrally challenged childish chowderheaded chuckleheaded cretinous daft

Origin

From bird + brained.

Forms

more birdbrained most birdbrained