when you are playing league of legend with your pals and they are about to get roasted but you come in with that CHINGUS SLAM and fuck those idiots sideways into the wall with your fed ass.

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.