Short for the word social, meaning to go out and socialise with other people.

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.

80s term for member of the preppy, "social" crowd. Snootiness is implied.

Meaning a person who is stuck-up, snooty, and thinks they are better than everyone else.

Sons of Sam Horn - Red Sox fan Forum

sonsofsamhorn.com

very stuck up, don't let anyone join anymore, last time I checked.

Your social security number.

The abbreviation for the term, "socially of." Otherwise known as someone who does not pick up social cues.