Top Definition
A granola bar, Power Bar, Clif bar or any other kind of snack or meal replacement bar that gives you gas shortly after you eat it.
Todd: On a lighter note...
Scott: No, I'm having homolunch. Fuck.
Todd: Fart bar and a V8?
Scott: Yup.
by Jerky1037 October 15, 2008
1 more definition
Any fiber bar after it is consumed makes you fart for a whole day straight.

You can count on it for non stop farting.
fiber one. A fartbar that contains fiber.
by recovergirl May 26, 2011

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