To act, do, or say something suspect or shady that others find negative or wrong.
Friend #1 : Yo dude, last night I was bored so I went and slept with my ex girlfriend...
Friend #2 : dude, THATS SOOO SUS!
Man1: (hugs man2)
Man2: ok thats long enough im feeling a bit "sus" now.
the use of "sus" has become come obnoxiously overused at my school in the last 2 years. my question is: is this an isolated incident or has sus spread further around the country?