old-fashioned slang On suspicion (of being guilty of something). Primarily heard in UK. We picked up three youths on suss of robbing a local newsagent.
on susson suspicion of having committed a crime. British informal
Suss is an abbreviation of suspicion , earlier and more correctly spelled sus . Until its abolition in 1981 , a law nicknamed the sus law allowed the police to arrest a person on the suspicion that they were likely to commit a crime.