Wiktionary
addlehead
n. (context colloquial English) A foolish or dull-witted person.
WordNet
addlehead
n. a person with confused ideas; incapable of serious thought [syn: addle-head, loon, birdbrain]
Usage examples of "addlehead".
My unit was up against those Terran supremacy addleheads in the far side of the Orion Arm.
She was obviously going to get little useful information out of this addleheaded being.