What's 'skadonk'?

SKADONK means: a) In South Africa, the word ''skadonk'' is colloquially used to describe an old car that is usable, but nearing the end of its lifespan. It is onomatopoeic with the sound that such a car would make (a noisy drive) b) an old battered car c) paper product used as a barrier against unwanted messes, such as the liner at the bottom of a bird cage