MMAO is an abbreviation for the term used to describe a person who is moaning their ass off about things that displease them. They can also be referred to as a buzz kill or buzz killington.
"Oh god you were totally MMAO last night, you killed the mood for everyone laamme!"
by KKOSC July 07, 2013
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.Buy the mug
Can you define these popular missing words?