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1.
A human roomba — A midget on a skateboard that slides around on your floor eating garbage
My hoomba is getting fat... 'bout time to trade him in.
by cbd March 11, 2012
 
2.
Also known as Human Roomba

It’s that thing of when you put a midget on a skateboard and it slides around on your floor eating garbage
"I think we need to get a new hoomba, this one is getting lazy."
by Midge T. March 31, 2012
 
3.
A "nothing" word used to replace a noun when the appropriate noun cannot be thought of in the amount necessary for conversation.
1) "Hey, grab me that...hoomba"
2) "I was struck on the back of the head with a...hoomba."
by AmateurX March 06, 2009