be a sure thing

be a sure thing

To be certain to happen; to be a probable outcome. It's a sure thing that they'll hire you—I just confirmed it with the recruiter. She's the most popular candidate, so it's a sure thing that she'll become student council president. Trust me, when it comes to gambling, there's no sure thing.
See also: sure, thing
Farlex Dictionary of Idioms.
See also:
  • have a good opinion of (someone or something)
  • have a high opinion of (someone or something)
  • have a low opinion of (someone or something)
  • have a good, bad, high, low, etc. opinion of somebody/something
  • have a bad opinion of (someone or something)
  • know where (one) is with (someone or something)
  • know where you are with
  • know where you are/stand
  • follow up with (one)
  • know where one stands