Definitions for "Upside down"
in such a manner that the part normally pointed upward is pointed downward; same as upsidown and upsodown.
in an inverted manner; "the box was lying on the floor upside down"
"Upside Down" was a successful single by Motown legend Diana Ross. It hit number one on the Billboard Hot 100 on September 6, 1980, introducing her music to a new generation of fans who may not have heard it before.
If you are upside down on your lease then it means that you owe more money on your car at the end of its lease than it is worth.
When you owe more on your auto loan than the your car is worth.
This means that a customer currently owes more on his or her vehicle than it is worth. Refer to Buried.