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n., int. - Euphemism for diarrhea. Adults tend to use "fliff-fliff" in the presence of children. The onomatopeoic origin stems from the noise created by a fiery blast of explosive diarrhea hitting the toilet water surface.
CHILD: "Mommy, I don't feel so good."
MOTHER: "Honey, do you have to go fliff-fliff?"
by KnigKnog July 02, 2009
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