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Short for muffin gruffin: also know as a queef or fanny fart. A fart from your downstairs mixer.
Did you just muff gruff? It stanks
by OfficialMuffGruff June 17, 2016
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2
The 5 o'clock shadow girls get after a few days of not shaving their pubic region.
If you think I'm eating that with that muff gruff going on, you got another thing coming.
by Stevile September 02, 2011
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