When your too fucking scared in saying the word shit so you misspell is purposefully so that nobody can say you said shit and you can always retaliate with shxmit usually used by tiny children trying to act cool but too scared to say a fucking "BaD wOrD" which are literally one of the most common words used in the world

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.