When a female liberates a vaginal discharge on a item of furniture, clothing or other object. Douche marks are usually the bi product of sexual intercourse.
Man you and your lady left some wicked douche marks on my couch last night.
The stretch marks that appear on a woman's t-shirt between her breasts. In order for this grossly underappreciated phenomenon to occur, the perfect ratio of breast shape, breast firmness and shirt tightness needs to be achieved.