A dark demon race of other dimensional origin. Who travel to earth through dimensional portals Which open up below concrete.They then proceed to suck the much needed water through the concrete and back to their home dimension.
"Holy monkeys, those damn water goblins are stealing my god given ground water again!"
A race of other-dimensional goblins, who suck water through concrete. When this happens, a loud noise is heard.
Good God! The Water Goblins are stealing my water!