Bad tasting, shitty complementary coffee such as that set out all day for customers at a bank. It often tastes burnt if sitting in a pot or tastes weak or acidic if served from a thermos dispenser. Occasionally somebody will help themselves to a cup, but nobody really enjoys it. Often served in small white styrofoam cups with a large canister of powdered creamer nearby.
“Is there a place to get coffee here?”
“Nah, all they serve here is shitty bank coffee.”