- Uh uh is defined as "no."
An example of a time when you would say "uh uh" is if someone asks you if you have any milk and you do not.
This woman says "uh uh".
uh-uh definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Informal used to signify a negative response
uh-uh definition by American Heritage Dictionary
Used to express disagreement or an answer in the negative.