1) an expression used to avoid giving an answer when one is confused, mostly used in chemistry class

2) a noise used in a feeble attempt to make students laugh
Samson: "How do I find the molarity of an acid?"
Barbs: "..auu?"
by tutorin May 12, 2007
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A gay slang used as a request to have ROUGH anal sex and possibly CBT, and uncommonly used to request for a blowjob.

Sometimes used as a request of the sequence known as '69'.
Sarah: "Hey Production can you Hop On AUU?"
Production: "😘Sure thing bestie💖, ily bb😍"
by Dark Imperatore : ) November 2, 2021
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a phrase used by auu players used to request for rough anal sex and cbt. also uncommonly used to request for a blowjob
Yo you wanna hop on auu?

Yea ill be there
by notproductionlolololol August 20, 2021
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Something so funny or painful, that you slap your fore head.
auu shitt you stupid mo fo!
by johnknotabuc April 25, 2019
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A mental disorder that is caused by playing the ROBLOX game "An Unoriginal Universe", causing the victim to become a complete irritable asshole.
"Hey, you know Alex? He has AUU Syndrome!"
"No way!"
by N7bby February 6, 2022
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