Something in the exact arch of her upper unbroken row of teeth, and in the keenly pointed corners of her red mouth when, with parted lips, she somewhat defiantly turned up her face to argue a point with a tall man, suggested that there was potentiality enough in that lithe slip of humanity for alarming exploits of sex, and daring enough to carry them out.
There are no more uses of "lithe" in the book.
Show samples from other sources
The lithe dancers seem to float across the stage.
Although Elvis is best known for his lithe, gyrating "Hound Dog" days, it is his later, weightier, gold lamé–draped self that remains the most emulated among most of his impersonators.
Alyssa Fetini -- Time Inc, 2010 -- http://www.time.com/time/specials/packages/article/0,28804,1952461_1952460_1952463,00.html#ixzz0wPA0qwrx(retrieved 08/12/10)