A request that the listener/audience waits until they have heard all the information before voicing their
opinion. Often
said when the speaker anticipates that what they are about to say
will be prematurely interrupted, dismissed or ignored without allowing the full story being told.
Family
Guy:
Brian & Stewie (S08E17)
Stewie: Look, I’m going to propose something and I need you to hear me out. Will you promise me you’ll do that?
Brian: I guess...
Stewie: You guess? Or you
will?
Brian: Yes I’ll hear you out.