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?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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 © Farlex 2017