I think that the above poster is talking about the first call, before Trevor kills most of the O'Neil brothers.
As for the call you're talking about, TC, one of the O'Neils calls Trevor and yells at him for a bit. Trevor responds along the lines of "Ooh, I'm so scared, come and threaten me to my face' and the brother replies along the lines of 'Ok, I will - I don't know when, I've got things to do right now, but I'll come when I'm ready!'
''Snake from Metal Gear 2 owns everybody. Because he used an owl. To make a guard think it was night time. In the middle of the day. That's just hardcore''