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a loud no that comes out when you hear something so dumb it makes your brain shut off. it’s like when your cousin says he can bench 500 pounds and you just say ‘nah uh’ like you’re the king of the gym.
"He said he could eat 10 burgers in one sitting. I said 'nah uh.' He ate 8."
"She said her dog could talk. I said 'nah uh.' The dog said 'you’re loud.'"
"He said he could beat me in a race. I said 'nah uh.' I won by 10 seconds."