Lingerie tape, also known as cleavage tape, fashion tape and tit tape, is a double-sided adhesive tape, used to secure the edges of a strapless dress or top to the cleavage

Cleavage (breasts)

Cleavage, anatomically known as the intramammary cleft, is the space between a woman's breasts lying over the sternum. Cleavage is exposed by a garment with a low neckline, such as ball gowns, evening gowns, swimwear, casual tops and other garments....

 or side of the breast

Breast

The breast is the upper ventral region of the torso of a primate, in left and right sides, which in a female contains the mammary gland that secretes milk used to feed infants.Both men and women develop breasts from the same embryological tissues...

s or on shoulders to secure bra straps from slipping, in order to keep the item of clothing in place and to avoid a wardrobe malfunction

Wardrobe malfunction

A wardrobe malfunction is a euphemism for accidental exposure of intimate parts. It is different from flashing, as the latter implies a deliberate exposure...

. It may also be referred to as toupee tape or wig tape, a similar double-sided tape intended for a different function (securing a hairpiece or merkin

Merkin

A merkin is a pubic wig. Merkins were originally worn by prostitutes after shaving their genitalia, and are now used as decorative items, erotic devices, or in films, by both men and women.-Origin of term:...

).