What is hyrdoclonic?

i was watching the scooby-doo movie and i was paying close attention this time and the begening part where shagy said we dont go anywhere with the words spooky forebiden or creepy in the name or hydroclonic but thats for a whole different reason man. and i wanted to know what hydroclonic means so i looked it up on the internet but it didnt say anything about it so does anyone know what it means