Callygipian

A person (typically female) who has a well rounded Buttocks, and gets all of the men---wether she likes it or not. One whose back end is pleasing to the eye, and must require a second glance.

Jack:"Richard, did you see Rachel? she does have quite the delectable buttocks; it is fascinatingly enormous!
Richard:"Great Scott Jack! I do believe she is a Callygipian indeed!