trust you, him, her, etc.

trust (one) to (do something)

1. To have faith that one will perform a particular action. Now that you know what's at stake, I trust you to make the right decision. Can we trust Sarah to close the deal with FlemCo?
2. It is typical or predictable of one to engage in some action or activity. Trust John to make a big deal out of something so trivial! This tax plan is really outrageous. Trust the government to favor big business over middle-class citizens, huh?
See also: trust
Farlex Dictionary of Idioms.

trust ˈyou, ˈhim, ˈher, etc. (to do something)

(spoken, informal) used when somebody does or says something that you think is typical of them: Trust you to forget my birthday! Trust it to rain at the weekend!
See also: trust
Farlex Partner Idioms Dictionary
See also:
  • trust (one) to (do something)
  • trust to
  • trust to do
  • trust in
  • trust in (someone or something)
  • trust me
  • Trust me!
  • not trust (one) an inch
  • not trust somebody an inch
  • not trust someone as far as you can throw them