A word usually used by stupid 9 year olds after they see to many people see it on the popular game, among us. If you hear anyone meaningfully say the word "sus" in public, feel free to dropkick them
Basically being sexual to someone, or it could mean you're an IMPASTA but if you're on discord, it most commonly means you being sexual, for example:
Me: Hey avi, adam was being kinda sus to me yesterday.
Avi: Huh? what did he say?
Me: Well i said "gimme cake" and he said "aww but you're already sweet enough"
Avi: Ooooo~ i ship