Not by itself, but as part of a participial phrase, it may be.

An example would be "He was caught stashing his drugs in his friend's car."

in a bank or a piggy bank

Sleeping, eating, playing, stealing and stashing.

because they are stashing all there butter chicken for the winter

Yes. All ferrets now matter how tame will do what is called "stashing". Stashing is when the ferret stores away certain toys or pieces of food for later or to hide them from other animals that might take them.