Also known as: 食い込み, 内裤陷入, 勒裆
When a piece of clothing or Underwear is "wedged" so that it's caught between the buttocks or Labia.
This is typically considered an act of Humiliation when done on others, but considered a sexually provocative act when it's performed by oneself. It may also occur naturally.
Garments that are naturally designed to sit between the buttocks—such as Thongs, Fundoshi, or G-Strings—should typically not have this tag, unless the person is being given a wedgie.
For garments wedged between the Labia, see Frontal Wedgie.