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The resulting stench and theoretical stink particulate matter from a fart/flatulent episode. Etymology: slang based on the word "shrapnel", the primary connecting theme being the dangerous particles emitted by the event.
"Dude, you farted right next to me! I know you didn't aim it at me, but the fartnel is gonna be all over me!"
by Halesite May 06, 2010
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