the need to take a massive intense shit
ive been holding this mumble-grumble all day.
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Term used to describe someone who complains, bitches and moans all the time but does it in a low 'mumbled' voice, and in low, run-on sentences so you can't understand what they are saying.
Usually, but not always, limited to grumpy old men.
That old dude looks mad, and keeps mumbling something, but I can't understand him.
Yeah that's old man Withers...he's always all Mumbly Grumbly.
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verb - it is when a person shakes his/her head looking downward with a melancholy look on his/her face while making a soft grunting sigh
John: Why are you so lame?
Sunny: *grumble mumbles*
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