Question

What does it mean when someone is on the borderline?

Answers

Ms. Sue
He's between two different states of health or behavior.

http://www.google.com/#q=borderline+definition

What is the context of this use of borderline?
Anonymous
I'm talking about money when a person is almost destitute. Is that context okay?
Ms. Sue
He's on the borderline between being destitute and able to support himself.
Anonymous
Yes.