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When you hold in a fart and you get a stomachache.
Bob: Oh man I had a huge fartache because I was on the subway and I didn't want to fart in front of everyone!

Susie: Oh are you okay?
by hannaHHannah November 08, 2008
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Whenever you fart and get a head ache from the fumes from your
but hole.
*Fart* "oh shit man i got a fat fart ache" (Sore head)
"oh man that stinks your gonna give me fart ache"
by John Payne April 12, 2008
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