Top Definition
A common response to a "grumble."

var. -
*Murbumbler, one who murblebumbles. (noun)
*Murbumbly, when something seems similar to murblebumbling.
I so murblebumbled that gurgle!
I want to be a murbumbler when I grow up!
Travis is being so murbumbly to Lizby today!
by Lucke & Lizby January 22, 2009
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