Suss is suss, and is used as a synonym to something being cool, but can't be overused or else it turns wrong. Things that are suss include your phone charger working when before it didn't, the smell of a fresh pizza box opening, and getting head in the school bathroom. Someone who says they are suss or that they "have sauce" qualify as anti-suss, and can be seen as a little gay. Being a little gay is suss, but actually being gay is kinda anti-suss.
Male 1: "Hey do you want to jack each other off later at your house?"
Male 2: "Maybe... kind of weird that you ask since I thought we were both straight"
Male 1: "Oh yeah sorry I forgot to tell you; no homo"
Male 2: "Thats kinda suss"
Male 1: "Alright I'll meet you at your house at 9"
Male 2: "Lookin forward to it"
Yo, all these guys are sussing in the washroom! I grabbed an 8-ball
Short for "suspicious". Used for casual and informal conversations.
Friend: "Yo dawg shake my hand".
You: That seems pretty suss man.
Ab adjective to describe something that is perverted and sexual like an extreme fetish.
Jeff: Ben has a young kids clown fetish.
Lee: That is suss to the max.