Definition of "sus"

sus¹

/sʌs/

noun
uncountable
1. (UK, informal) Suspicion (in terms of a sus law).
  Quotations
  The committee […] said ‘sus’ had acquired a symbolic significance out of all proportion to its significance as a criminal charge.
  2002, Simon James, British Government: A Reader in Policy Making, page 84

sus²

/sʌs/

adjective
comparative more sus, superlative most sus
1. (slang) Suspicious; having suspicions or questions.
  Quotations
  Even my lame psychic ability told me he'd be pretty sus if he found me pissing on in the lounge room on a week night.
  2010, Olwyn Conrau, The Importance of Being Cool‎, Carindale: Glass House Brooks, page 134
  Everyone had been a bit sus about Mrs Jones and Lana Vilenskaya, so it wasn't surprising that Mrs Jones stood to speak.
  2015, Peter King, The Weaving‎, Wellington: Peter King Publishing
  I'm still really sus about those crocs we found in the drains.
  2018, Ron Chinchen, Scent of the Beast‎, Bloomington: Xlibris
2. (slang) Suspicious; raising suspicions; causing people to have suspicions.
  Quotations
  Why this should be I will never know except I might be a pretty sus looking geezer or something. They took about six of us who were in the cafe down the nick and dubbed us up in separate peters. After a long while these two bogies came into ...
  1972, Frank Norman, The lives of Frank Norman: told in extracts from his autobiographical books Banana boy, Stand on me, Bang to rights, The guntz
3. (slang, derogatory, of a man) Gay or effeminate.

sus³

/sʌs/

adjective
not comparable
1. (music) Abbreviation of suspended.