Top Definition
A human being (or something like one) who is so retarded that they cannot speak, cannot walk by themselves, cannot eat by themselves, etc. They usually "communicate" through noises like "nnnnhh" or "eiirrr" or" "AOUEEEEOuuuu" and they shit their pants all the time so they usually fucking stink and they try to eat everything and don't listen to anyone. They usually have severe combinations of Downs Syndrome, Autism, Asperger's, and cerebral palsy.
Michael: "Hey nick, why is that kid moaning and rubbing shit on that trashcan?"

Nick: "Oh him? he's just one of those Ultra-Downy's."
by pinche-head December 06, 2011

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A person who in the strict sense of the word is above and beyond retarded. Furthermore it is used to describe that person who picks their nose and whip it on your sleeve when you aren't looking.
No dude, she's an Ultra Downy
by legen...wait for it..dary! May 13, 2011

The Urban Dictionary Mug

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Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt