To shamelessly crack out on social media while in a room full of people completely clueless to the conversation at hand and randomly blurting out anything that makes you LOL.

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.