daft

"Ow, he is just a wood harum-scarum creature, that wad never take to his studies;—daft, sir, clean daft." / […] / "[W]owff—a wee bit by the East-Nook or sae; it's a common case—the…

The boy gathered himself up, shook his shaggy head, and, said, in a piteous tone: 'Davie's daft!' 'Davie's daft!' He then kicked the poor idiot till his cries attracted the attenti…