It's just a phrase like when somebody has some bad or weird news you just respond with "yoyt"

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.

A term used to demonstrate excitement or interest in something, usually food. Also a way of saying yes to something that you are happy about.