'hipless' definitions:

Definition of 'hipless'

(from WordNet)
adjective
Having or seeming to have no hips; "slim and hipless" [ant: hipped]

Definition of 'hipless'

From: GCIDE
  • hipless \hipless\ adj. having hips which are not prominent; seeming to have no hips; as, slim and hipless; -- of people. Opposite of broad-hipped [WordNet 1.5 +PJC]