There were also the faces of loose-mouthed young men and maliciously unkempt females, the kind who led the booing in newsreel theaters at any appearance of a businessman on the screen; they did not attempt a counter-demonstration; they were silent.
There are no more uses of "unkempt" in the book.
Show samples from other sources
This kid has long, unkempt hair and a hardened look about him.
Neal Shusterman -- Unwind
With his dark unkempt hair, his unlined face, he looked no more than twenty-five.