having shapely buttocks
"His most prominent work, however, was on the cover of book jackets, where his signature images were of strikingly fierce, hard-bodied heroes and bosomy, callipygian damsels in distress." From an Obituary of Frank Frazetta by Bruce Weber and Dave Itzkoff, New York Times, May 10, 2010
About the word:
Callipygian comes from the Greek words for "beautiful" and "buttocks." Calli- (spelled in Greek as kalli-, meaning "beautiful") also appears in the word calligraphy, while pyges ("buttocks") turns up in the less-complimentary steatopygia, naming excessive development of fat on the buttocks.
Photo: Peter Rivera / flickr