Definitions by Yomomgei

Sus 

A “straight” person (usually male) who engages in suspiciously gay activities.

Usually in such a way that arouses suspicion and doubt regarding their sexuality around their peers.
Short for suspicious/suspect

Person 1: Bro, Dan been going a bit too far with those no homo jokes, a bit sus don't you think?

Sus by Yomomgei May 20, 2021