That makes two of us. spoken language
I agree with your opinion; me too
A: This room is poorly ventilated. B: That makes two of us.
A: I'm about to go to the park for a run B: That makes two of us.
Used to share ideas or opinions in common with other people in public
Used to say that you understand what someone is saying or suggesting
The origin of this expression is not clear.
Used to describe a person being more careful after an accident or a bad experience in the past to avoid it happening again.
I drive more carefully after an accident when I was little because a burnt child dreads the fire.