Definitions

1. adjective

having a foolish or silly idea, especially one based on a misunderstanding or a half-baked notion.

“The comedian’s halfheaded joke bombed at the stand-up comedy night.”

2. noun

a foolish or silly idea, especially one based on a misunderstanding or a half-baked notion.

“The halfheaded notion of going to the beach in the middle of winter is not practical.”