A general insult that more or less means a little shit disturber or someone who ruins the mood/ kills the fun.
What, we're not going to the mall tommorow? Don't be such a monkeyfart.
by Andrew Maxwell October 31, 2003
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one who continues to fuck the monkey after the queafing begins
i am a MonkeyFart Fucker
by ezkumezgo June 9, 2009
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