Something you exclaim to Christian vegans while they're ensconced upon the lavatory, discharging fizzy gravy out of their crinkly crater and singing the Ugandan national anthem whilst rubbing their tummy

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.