Slim and hipless.    From Wordnet, Princeton University. 

Adjective : hip boots.    From Dictionary.com. 

Is Demi Moore airbrushed hipless on the cover of the December issue of W?.    From Wordnik.com.  [Demi Moore Mohawk Photo] Reference

I'm also very thickwaisted, and relatively hipless, with very long, skinny legs.    From Wordnik.com.  [Fabric Week Friday - A Dress A Day] Reference

The book is lovely and the directions easy, but the skirt designs are made for slim, hipless younguns.    From Wordnik.com.  [Sew What! Skirts - A Dress A Day] Reference

Fashion veered toward the defensive, the practical: Zippers, sneakers, hoods and pockets were attached to designs for hipless girls and skinny boys.    From Wordnik.com.  [The Girdle's Back, and Gwyneth's Got It!] Reference

McGuigan, a tall, thin, hipless Australian with a barbarous accent, stepped forward eagerly to meet the man with whom he had talked in both Gemini and Apollo.    From Wordnik.com.  [Space]

However, as soon as someone without hips in Taos is polled, be prepared for Chris Matthews to lament that Obama cannot connect with the hipless hippies in Hispanola America despite having months to close the deal.    From Wordnik.com.  [Palin To Go On Attack Against Biden On ... Foreign Policy?] Reference

Many modern young women bobbed their hair in variations of gender-bending pageboy styles, the corset-less look that Poiret popularized and increasing female recreational athletic activity hastened a fad for flat chested, hipless, boyish female figures, and the garçonne became synonymous with the stylish flappers.    From Wordnik.com.  [Tove Hermanson: Women, Pants, & Politics] Reference

BLONDES I discuss how tall, super-skinny hipless bodies aren't as desirable to most men as many women think.    From Wordnik.com.  [WordPress.com Top Blogs] Reference

Yes, the hipless, concave figure of high fashion that trickles down to the high street is dominating these young girls 'every thought.    From Wordnik.com.  [Irish Blogs] Reference

But the real, overflowing compensation came when that little, lithe, hipless man in black jumped to his feet and stormed the audience with a dance of hands and arms, feet and legs, head, neck, and the whole body, which Mordkin in his finest frenzy could not have equaled or approached.    From Wordnik.com.  [Familiar Spanish Travels] Reference

Next day, when the steamer came in, Baptista saw her husband rush down to meet it; and soon after there appeared at her door four tall, hipless, shoulderless girls, dwindling in height and size from the eldest to the youngest, like a row of Pan pipes; at the head of them standing Heddegan.    From Wordnik.com.  [Victorian Short Stories: Stories of Successful Marriages] Reference

I have been known to moan me? moan? about how it is not fair that French women are generally stick thin and hipless – but perhaps if I hadn’t been brought up on a diet of Rowntree’s misshapes I too would have an androgynous figure and would not be subject to sugar/salt cravings at inappropriate times of day.    From Wordnik.com.  [public displays of gluttony] Reference

Even hipless handy-persons are person ... lol.    From Wordnik.com.  [Palin To Go On Attack Against Biden On ... Foreign Policy?] Reference

Alice was small, thin-wristed and nearly hipless.    From Wordnik.com.  [Here Comes Another Lesson] Reference

Why not "hipless"?.    From Wordnik.com.  [The Education of Miss Jeanne Fourmont] Reference