Used to describe a shirt, tank top, crop top or similar upper garment which is so tight across the chest area as to cause a rippling stretch in the fabric between breasts. For the same effect in a one-piece swimsuit, tankini and bandeau bikini top, use the more general taut clothes.
Not to be confused with impossible shirt, which is even more form-fitting and unrealistically follows the inner curve of a cleavage or behind an underboob. On occasion, such as for post #635469, both tags may apply.
Related forum discussion: topic #3155
This tag implicates taut_clothes and shirt (learn more).