The Negaverse is an evil universe in the sailor moon anime franchise. It is ruled by Queen Beryl and the Negaforce. The Negaverse is also known as the Dark Kingdom. The Negaverse was destroyed when Princess Serena used Cosmic Moon Power.

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.

Used in the popular Disney Cartoon Darkwing Duck (1991-1992) in the episode "Life, The Negaverse, And Everything". The Negaverse was an alternate universe in which everything was the reverse of the original world. Darkwing Duck's infamous foil, Negaduck, originated from the Negaverse. The Negaverse is only mentioned once in the series when Darkwing Duck is thrown into a portal to the Negaverse disguised as a birthday cake.