suss out

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From suspect.


suss out (third-person singular simple present susses out, present participle sussing out, simple past and past participle sussed out)

  1. (slang, transitive) To come to understand (a person).
    We've sussed him out — he only drinks on Fridays and only in that bar in town.
  2. (slang, transitive) To manage to work (something) out, to determine (something).
    We've sussed out how to open the lock.
    • 2012, The Economist, Electric cars: Difference Engine: Tailpipe truths
      As far as electric cars are concerned, motorists have sussed out that they do not make particularly good financial sense, even with a $7,500 handout from the federal government.