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When another does an audible guff (fart) and you decide to drop a silent one on the back of theirs and blame them for the offensive odour
Mark: "parrrrrp" Whoops, sorry, couldn't hold it in any longer
Baz: "Pfffst" ... OMG Mark, that smells gross, you got dead rats up your bum
Mark: You sure you're not Piggy Back Guffing again as mine don't smell that bad
by Fatcatkim November 03, 2011
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