Noun
underboob (plural underboobs)
(colloquial) The lower part of a woman's breast, especially when uncovered or revealed by clothing.
Even though she censored herself, her underboob was still visible. Source: Internet
Kinsey’s bathing suit top exposed a small amount of underboob, while Abby’s was riding up to reveal even more of her ample cleavage. Source: Internet
She wore two large, black, heart-shaped pasties over her breasts, covering up any NSFW elements while still leaving her ample assets on full display, flashing a serious amount of underboob and cleavage. Source: Internet
Late afternoon sunlight, likely paired with a portable flash, beautifully highlighted her underboob and the vertical lines of definition running down her abdominal muscles. Source: Internet
It featured extra straps along the top and it was so small that her underboob was showing. Source: Internet
Its design helped put her underboob on full show. Source: Internet