That makes two of us
Definition 1 of 1
Pro Tip 1/3Agreement Expression
Use it to show you agree with someone's opinion or share a similar experience. 
A: I'm not a fan of cold weather. B: That makes two of us.
Pro Tip 2/3Colloquial Bonding
It's a casual phrase to create a sense of camaraderie or shared understanding. 
You're feeling overwhelmed by work? That makes two of us.
Pro Tip 3/3Not for Formal Use
Avoid using it in formal contexts. Best for conversations with friends or peers. 
This phrase 'that makes two of us' would be too informal for a business meeting.