Entry 1 sense Webster, 1913 Steatopygous /(-gŭs)/ · Ste·a·top·y·gous · IPA /ˌstɪ.əˈtɑ.pɪ.ɡəs/ 01 a. Having fat buttocks. 1. Having fat buttocks. “Specimens of the steatopygous Abyssinian breed.” — Burton.