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1.
"a dirty, thundering, ass clapping fart that is muted by/through a blanket, pillow, or chair (be it office chair, car seat, couch or recliner)"

Can also be short formed to mungle.
You didn't hear that did you?

No.

Wait for the smell cause I just destroyed my chair with a munglefluff.
by mkspeck May 18, 2011