During sexual intercouse when the male inserts a small (preferably dead) bird into the anus of the female. The female than proceeds to imitate the sounds this type of bird usually makes. During this time the male should stay as quiet as possible and refrain from making eyecontact with the female.
When the female is done imitating the bird, the female squeezes the bird out and after the male has ejaculated onto the bird, the female eats the bird.

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.