Revocable Line Of Credit

"You can borrow up to 500 grand. That's your credit line. But I can revoke that right at any time. Maybe I can also force you to pay off quickly whatever you've borrowed thus far (I'll have to read the contract carefully)."

That line is...fragile, so depend on it cautiously. And if you're the lender, you'd charge less for a revocable vs. an irrevocable LOC, right?

See: Line of Credit.