When someone rubasses something, they rub it very hard to clean or polish it.
Rubassing something usually makes it shiny and clean.
Examples:
She rubasses the table until it shines.
I rubasses my shoes to make them look new.
He rubasses the car to make it sparkle.
The cat rubasses against my leg to get my attention.
I rubasses the mirror until I can see my face in it.
The little girl rubasses her toy until it looks new.