thickhead Meaning, Definition & Usage

  1. noun Australian and southeastern Asian birds with a melodious whistling call
    whistler.

WordNet

Thick"head` noun
Definitions
  1. A thick-headed or stupid person. Colloq.
  2. (Zoöl.) Any one of several species of Australian singing birds of the genus Pachycephala. The males of some of the species are bright-colored. Some of the species are popularly called thrushes.

Webster 1913