brevice

Noun
brevice (plural brevices)
The crease underneath the breasts combining the words breast and crevice.

Example 1:
After an intense all-nighter playing Call of Duty, sweaty gamer Bob's brevices were sodden, leaving an outline on his t-shirt!

Example 2:
Alice complained of a moist brevice area, not only from the heat wave but also her enduring menopause.