When two people of the same gender act as though they like each other in a non-platonic way. This is commonly seen with two guys but can be seen with other genders as well.
"Bro, Josie and Omar are always acting sus."
"Nah, they're nothing compared to Parker and Lewis, did you see what happened in A-hallway?"
Sus was first used in among us at the time of its popularity. But is it called Sus? It's because its short for SUSPICIOUS. but now It's used for weird things I won't even say... i won't even say how It's used in a sentence...
Originated from the game "Among Us", apparently meant to mean "suspect" as in the sense of that someone saw a person doing something suspicious, in-game or in real life.
An example of jargon from Among Us. Used to suggest that a player is acting SUS-picious and may be the Imposter.
Red: I'm serious, guys! I saw Blue kill Yellow and then vent!
Blue: I dunno, Red, you seem kinda sus to me.
(Red was not the Imposter. Two Imposters remain.)