When two people are stuck together at a party or place and don't see eye-to-eye with each other leading to bad harmonies at the place.

Two people causing negativities/bad harmonies.

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.