someone who is not very clever, according to others. not very intelligent. a bit slow.

Obsidian (/əbˈsɪdiən/) is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

Obsidian: Those rocks are intrusive. They cool slowly underground, so they have thousands of years to form crystals.

The phrase not the sharpest tool in the shed means someone who is thought to be unintelligent in some way; slow to perceive or understand something. Note: There is a similar expression with the same meaning as this one that goes “(he/she’s) not the brightest bulb in the box.”

Noun. not the sharpest tool in the box. (humorous, euphemistic) Lacking in intelligence; dimwitted.

From Longman Dictionary of Contemporary Englishnot the sharpest tool in the box/shednot the sharpest tool in the box/shed (also not the brightest crayon in the box), not the brightest bulb on the Christmas tree informal used to say that someone is not very intelligent or is not able to learn things quickly or easily – …

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.

“Not the brightest crayon in the box” expresses the same idea as “not the sharpest knife in the drawer.” It’s a joking way of saying that one person in a group is less of a quick thinker than others.

The glow stick everyone’s raving about. The Crème Shop’s Brightest Crayon in the Box is a chubby crayon highlighter comprised of a soft and highly shimmery formulation.

The basic ingredients contained in Crayola Crayons are paraffin wax and color pigment. The ingredients are the same for all Crayola Crayon colors, with some modifications in special effects crayons. The paraffin wax is melted and mixed together with pre-measured amounts of color pigments.

The idiom “not the sharpest tool in the shed” means someone who lacks intelligence, intellect, or smartness. It can be used to point out to a person who is naïve, dull, stupid, uneducated, or simply lags behind in comprehending jokes.

Common English idioms & expressions

Examples of Euphemisms

• passed away instead of died.
• passed over to the other side instead of died.
• late instead of deceased.
• dearly departed instead of deceased.
• resting in peace for deceased.
• no longer with us instead of deceased.
• departed instead of died.
• passed instead of died.