Question about American Drama "Friends"
Phoebe: Hi, Mike's place.
Mike: Hey, it's Mike.
Phoebe: Ooh, that was fast.
Mike: Oh, err... no, she's not here yet. You know, I think I'm just gonna take off and break up with her over the phone...
Phoebe: Yeah, you can't do that! Oh, come on Mike, strap on a pair.Why don't you just tell her that we got back together.
What does "strap on the pair" mean?