A nip slip is a term frequently used by the celebrity press to describe an accidental, public reveal of a woman's nipple, although it can refer to a deliberate unveiling as well. It can also be known as a "wardrobe malfunction", a phrase that gained popularity after the 2004 Super Bowl when Janet Jackson's breast was accidentally revealed while performing the half-time show. The incident continues to be dissected and rehashed to this day, including in a 2021 documentary by The New York Times. The nipple reveal is considered one of the first viral videos on the internet and is one of the reasons behind why YouTube was founded.