A person who is a dick, but only chimes in on Facebook when another dick initiates it first.

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 person who lacks the skill, knowledge, or self confidence to argue a point on their own, but who will comment if they have one or more people on their side who have commented first.