The amount of “slay” energy an individual has. The amount of Slenergy one has can be defined by the size and massissivity of one’s fashion, father energy, penis size, etc.

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.