Sus LOL is an amalgamation of Sus meaning suspicious and LOL meaning laugh out loud. A Sus LOL occurs when someone tells a joke that is not funny in any way, but within the group one person does laugh. That laugh, then, is a Sus LOL because it's not certain what they are actually laughing at, or if they're just a terrible person.

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.