Joan from McKinney, Texas, wonders about the origin of the disparaging term knucklehead. It’s a mild insult, and as with blockhead and bonehead, it suggests that someone’s head is so full of blocks, bones, or knuckles that there’s no room for brains...
Erin in Austin, Texas, asks about at loggerheads, meaning stuck in a stubborn disagreement or being at an impasse. The idiom is about 400 years old and likely draws on more than one sense of loggerhead. One is a log-like head, or blockhead...
