Definition of Birdbrained

Adjective: birdbrained 'burd,breynd

(informal) stupid, slow witted or dull
"She is the birdbrained redhead who gets into ridiculous trouble";
- blockheaded, boneheaded, duncical, duncish, fatheaded, loggerheaded, thick, thickheaded, thick-skulled, wooden-headed, thick-witted