When you fuck up your chances with a girl by doing something extremely idiotic to the point of no return

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.

When you fuck so bad with a girl so bad that she loses all interest and blocks you on all social media