A negative saving rate means that, in aggregate, households are spending more than their current income by drawing down past saving, selling existing assets, or borrowing.
Households spending more than their current income by drawing down past saving, selling existing assets or borrowing, are all consequences of a negative saving rate.
Things that don't exist include a negative saving rate.
It sounds like you never cook.
An old man happily boards his plane, which is on time and not overcrowded.
The patriot has a horse.
The child is walking away from the tree.
Ken Starr didn't counter the White House's spin doctors.
a violinist are performing a concert.