not the sharpest knife in the drawer | not the sharpest tool in the boxidiomPart ofsharpnot the sharpest knife in the drawer | not the sharpest tool in the boxnot the sharpest knife in the drawer | not the sharpest tool in the box — idiomidiom1. This phrase means someone is not very smart or clever.1.idiomDefinitionThis phrase means someone is not very smart or clever.ExampleMaya is not the sharpest knife in the drawer, but she works hard.Do you think Brian is not the sharpest tool in the box?