not the sharpest pencil in the drawer
a clever euphamism for someone who lacks intelligence
see also a few bricks shy of a load, not the brightest bulb on the porch
see also a few bricks shy of a load, not the brightest bulb on the porch
Seth - "Did you hear about Werner? He tried to start his car with lighter fluid."
Taylor - "I'm not surprised; he's not the sharpest pencil in the drawer."
Taylor - "I'm not surprised; he's not the sharpest pencil in the drawer."