- a stupid person; blockhead.
- Also called whistler. any of several Old World birds of the genus Pachycephala, chiefly of various islands in the Pacific Ocean, related to the flycatchers, and having a melodious whistling call.
- a stupid or ignorant person; fool
- Also called: whistler any of various Australian and SE Asian songbirds of the family Muscicapidae (flycatchers, etc)