Bottomlessness

 is the act of being dressed up top while wearing nothing below the waist.

Trivia

 * A number of Liminals' dress styles tend to lean towards this due to many possessing lower bodies that make normal pants impossible to wear.
 * Unlike toplessness where only men are allowed to do so in social norm, it's unacceptable for both genders to go bottomless as exposure of genitals is considered indecent similar to women's nipples and areolas.