Someone who’s very healthy and fit, he’s usually very hyper but also knows your worst secrets and might blackmail you

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.

Just needs to be involved

Let him be