Rubbaboos are things that are messy or not organized.
Rubbaboos are usually not good because they can make things hard to find or use.
Examples:
Her room is full of rubbaboos.
I don't like it when there are rubbaboos on the floor.
He can't find his toys in all the rubbaboos.
The rubbaboos in the kitchen make it hard to cook.
There are so many rubbaboos in the garage, you can't even walk in there.
The rubbaboos in the yard are as tall as a house.