Limber; supple; flexible; lithe; lithesome; light; nimble; active. Sometimes written lissom.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. moving and bending with ease
Word Usage
"A sharp critic might accuse Mr. Du Maurier of lingering too complacently on the lines in question; of having a certain ideal of "lissome" elongation to which the promiscuous truth is sometimes sacrificed."