Whale Tail

Whale tail is the Y-shaped waistband of a thong or g-string when visible above the waistline of low-rise jeans, shorts, or a skirt that resembles a whale's tail. Intentionally or unintentionally, a whale tail is exposed above the trousers mostly when sitting or bending, or even while standing. The frequency or occasion depends on the style of trousers, the style of underwear, and the way they are worn. Flashing whale tails became popular in the early 2000s, together with the rise of low-rise jeans and thong underwear. The trend, popularized by a number of female celebrities including Christina Aguilera, Victoria Beckham, Mariah Carey, Melanie Blatt, Paris Hilton, Jordan, Anna Kournikova, and Britney Spears waned within the decade.

Specially designed trousers like low-rise jeans or hip-huggers and higher cut thongs lead to greater exposure of the whale tail. The trend was also associated with the trend of sporting lower back tattoos. The word was selected by the American Dialect Society in January 2006 as the "most creative word" of 2005. The concepts of visible panty line, buttock cleavage, and sagging are closely related to the whale tail.