draw blood

"Drawing blood" means making blood come out of someone's body. You can "draw blood" by cutting yourself or someone else:

A: Ow!

B: What's wrong?

A: I cut myself.

B: Oh, shit. Did you draw blood?

A: Yeah, just a little.

When a doctor or nurse takes blood out of your body to do tests, they say that they are going to "draw some blood".

This phrase appears in these lessons: