The Collaborative International Dictionary of English v.0.48:
Long-waisted \Long"-waist`ed\, a. 1. Having a long waist; long from the armpits to the bottom of the waist; -- said of persons. [1913 Webster] 2. Long from the part about the neck or shoulder, or from the armpits, to the bottom of the weist, or to the skirt; -- said of garments; as, a long-waisted coat. [1913 Webster]