Suss

When someone or something seems to be not what it or they claim to be. Suspect. "That dude hella Suss"

Oh man I though he he the super bomb. This shit looks kinda suss.

Suss

Somthing that is dope af and super steeze

Bro. That was so suss!

Suss

Acronym for :
Straight Up Street Slut
Pronounced like Dr. Seuss

Rob: Hey Mark, did you see me making out with that chick?
Mark: Ya, and I also saw her making out with some other guy 5 minutes ago. Rob, she's a complete SUSS!

suss that

A friendlier, less offensive version of "Fuck that!".

Nathan: Dude, you fancy feeding some more twenties into the slots?

Markus: Suss that man!

sussed

random assumption of a mate wanting to get down and dirty with someone

Ha ha, sussed Mike!

sussing

To suck, lick, fellate, or cunniling-ate, or otherwise orally manipulate.

Alternatively, one may drop the g and opt for an apostrophe ending - sussin'

I was sussing on her toes but when she came she kicked me in the mouth.

suss out

To come to understand (a person).

To manage to work (something) out, to determine (something).

Etymology: From suspect. (Copied from wiktionary)

Can you suss out Jim? Does he drink or not?

We've sussed out how to open the lock.