A drummer who is in a band and has an ego of Olympus Mons and is also not very good; they will also have the tendency to sue people or other bands

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.