I love the that saying, “not the sharpest crayon in the box” but people don’t really know what it means. People take it to believe it means the person in question isn’t the smartest person around. If we break it down you will get the true meaning. Allow me to break it down.
When you get a new box of crayon all the crayons are nice and sharp, unused if you will. But as a crayon gets used, usually the hardest working crayon looses its sharpness. So, when somebody says “not the sharpest crayon in the box,” what they are really saying is the crayon that’s “not the sharpest” is the hardest working crayon of the lot.
In reality, “not the sharpest crayon in the box” means the person the comment is directed at is really the hardest working person. When a person gets worn down to that point after years and years of manual labor, they lose their sharpness, in other words they become tired and worn, not dumb and ignorant.