A person, who is so uniquely stupid Its not even funny. Someone who is a Mongulont has about 4 brain cells from ear to ear.

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.