슴가

Etymology
From with the order of syllables reversed. .

Noun

 * 1)  boob; woman's breast

Usage notes

 * Usually used with a sexualizing connotation to refer to women's breasts.

Trivia
The slang 슴가 was first popularized in the Internet as a euphemism for woman's breast. But it is quite vulgar expression for breast today, since it lacked everyday contexts of the original word and kept only sexual one.