Definition of "square-headed" []

• Cut off at right angles above, as an opening or a figure with upright parallel sides; especially, noting a window or a door so formed, as distinguished from one that is round-headed or arched, or otherwise formed.

The Century Dictionary (Public Domain)

• " Sharp as a tack but looks like a dolt, square-headed, blue-black skin."
• "Her mother – her square-headed mother – paused from her breakfast duties and looked over her shoulder."
• "Next in today's episode: animated square-headed beings from the beautiful genius minds behind Peppermelon. tv."