Top Definition
An inaudible slurring style of speech which is often accredited to having drank one too many.
Paul: Last night, after Mark had one too many Coronitas, he was talking all mumbly-bumbly for the entire ride home...

John: Wow, what a lightweight...
by BigHairPaul May 26, 2008
5 Words related to Mumbly-Bumbly

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