What does box of hair box of hair mean?

box of hair box of hair meaning in Urban Dictionary

A derogatory metaphor regularly insult another person's cleverness level and comprehension of good judgment, researching their IQ to that of a box of hair, which--all things equal--should have an IQ of zero.u000du000au000du000aUtilized as an ultimate example of stupidity or uselessness in people, tips, or objects.