the whale tail is the shape formed when a g-string rides up high over a womans trousers

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.

the whale tail is the shape formed when a thong or g-string rides up high over a womans trousers

whale tail – the appearance of the top rear strap of a woman’s thong, v-string or g-string underwear above the waistline of her pants, shorts, or skirt whenever she sits, bends over or squats, though some low-rise clothing is now designed to display the whale tail at all times; so-called because the strap closely resembles a whale’s tail rising from the water.

A thong/g-string riding up the back, usually while wearing low-rise jeans. Derived from a whale's tail sticking out of the water.

A whale tail is the effect that happens when a girls G-string or Thong becomes exposed as she walks, bends over or squats. Actually whenever you can see that wonderful exposed thong in the shape of a whale's tail. Lowrise jeans and higher cut thongs are creating for extremly great Whale Tails around as more and more thongs become exposed.

A fashion boom popularized by Britney Spears and Anna Korinkova incorporating hipster jeans and high riding thongs.