t is also the sound a wet sponge makes when you throw it against a glass window and then it sliding down making a sweeky sound.
It is also an onomonopia or a word that sounds like how you say it.
You: "Ok!" (It hits the window)
Sponge: "splorange" or "Spppploooooraaaangeeeee"
cause it's just a word that rhymes with "orange."