Natyashastra
पुनराक्षिप्तकं कुर्यादुरोमण्डलकं तथा । नितम्बं करिहस्तं च कटिच्छिन्नं तथैव च ॥ १८४॥
Again, one should perform the Ākṣipta, the Uromandala, the Nitamba (buttocks), the Karihasta (elephant's trunk), and the Kaṭicchinna (broken waist) gestures.
english translation
punarAkSiptakaM kuryAduromaNDalakaM tathA । nitambaM karihastaM ca kaTicchinnaM tathaiva ca ॥ 184॥
hk transliteration by Sanscript