A woman whose body is very warm during the winter and cool during the summer and who generally has very firm breasts is called syama

Expressions researched:
"A woman whose body is very warm during the winter and cool during the summer and who generally has very firm breasts is called syama"

SB Canto 8

A woman whose body is very warm during the winter and cool during the summer and who generally has very firm breasts is called śyāmā.

SB 8.15.17, Translation and Purport:

Everlastingly beautiful and youthful women, who were dressed with clean garments, glittered in the city like fires with flames. They all possessed the quality of śyāmā.

Śrīla Viśvanātha Cakravartī Ṭhākura gives a hint of the quality of the śyāmā woman.

śīta-kāle bhaved uṣṇā

uṣma-kāle suśītalāḥ

stanau sukaṭhinau yāsāṁ

tāḥ śyāmāḥ parikīrtitāḥ

A woman whose body is very warm during the winter and cool during the summer and who generally has very firm breasts is called śyāmā.