Also known as: 下乳, したちち, 南半球, 下パイ, おっぱいスカート, underboobs, 乳出しチョゴリ, シタチチモン
When the bottom side of the Breasts are visible beneath clothing. The Nipples should not be visible.
Not to be confused with Underbust, which refers to the top edge of an article of clothing resting just underneath the breasts.