|1.||box of hair|
A derogatory metaphor used to insult someone's intelligence level and comprehension of common sense, comparing their IQ to that of a box of hair, which--all things equal--should have an IQ of zero.
That nuthugger would probably be smarter if her brain was replaced with a box of hair. Wait, probably not.
|2.||box of hair|
Used as an ultimate example of stupidity or uselessness in people, ideas, or objects.
Bob is as dumb as a box of hair.
My boss's newest scheme is about as dumb as a box of hair.
Most of Mr. Popeil's products are about as useful as a box of hair.