Suspicion (in terms of a sus law).
"The campus tour included visits to several sus, which are student unions at different universities."
plural of SU
In plain English: Sus is slang for someone who seems suspicious, shady, or guilty of doing something wrong.
"The police asked everyone to step forward and identify any suspicious activity in the crowd."
Usage: This slang term, popularized by the game Among Us, refers to suspicion in informal contexts and should not be used in formal writing. It is often confused with its adjective form when speakers attempt to describe someone as "sus" rather than labeling them as having "sus.
Suspicious; having suspicions or questions.
"The baseball coach declared the pitcher sus after he left the mound without permission."
Abbreviation of suspended.
In plain English: Sus means acting suspiciously or shady, often making you think someone is up to something dishonest.
"That guy acting so quiet and avoiding eye contact seems very sus to me."
The word "sus" comes from the Persian city name Sūs, which traces its roots back through Middle and Old Persian to an ancient Elamite term. It entered English as a slang abbreviation for suspicious, borrowing directly from the spelling used in African American Vernacular English rather than retaining the original meaning of the place itself.