The word rat is a noun to refer to a rodent mammal which is very fruitful, destructive and greedy. However, it is also used in sense figurative as an adjective to describe someone of thief, thief or stingy.In this case probably refers to a child with any of these three undesirable characteristics.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
