1. Australian and southeastern Asian bird with a melodious whistling call
   "The thickhead's beautiful song filled the air in the early morning";
   - whistler
    
2. [informal] A stupid person; used to express a low opinion of someone's intelligence
   "The teacher scolded the class clown, calling him a thickhead";
   - dunce, dunderhead [informal], numskull [informal], blockhead [informal], bonehead [informal], lunkhead [N. Amer], hammerhead [informal], knucklehead [informal], loggerhead [archaic], muttonhead [informal], dumbass [N. Amer], lamebrain [informal], pea brain [informal], chowderhead [N. Amer, informal], chucklehead [informal], bubblehead [informal], numbskull [informal], clunk [N. Amer, informal], dumbhead [N. Amer, informal], twonk [Brit, informal], dumbo [informal], lunk [N. Amer, informal]

Derived forms: thickheads

Type of: dolt [informal], dullard, flycatcher, meatball [N. Amer, informal], Old World flycatcher, pillock [Brit, informal], pudden-head [US, informal], pudding head [informal], stupe [N. Amer, informal], stupid [informal], stupid person, true flycatcher

Part of: genus Pachycephala, Pachycephala

Encyclopedia: Thickhead