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When you try to fart and a turd comes out and lays vertically in between your butt cheeks. mimicking a hot dog.
I just made a fartdog.
by klub2369 August 03, 2011
1) A canine prone to gastronomical expulsion. (I.E. A Terrier with a propensity for excreting air fouled by long term entrapment within the colon.)

2) An irritating boyfriend.
1) Pass the Ly-Sol, Jim-Bob! Something just crawled up that Fart Dog of yours ass and died!

2) Get OUT of my ass pocket, fart dog!
by Garden Gawaine July 16, 2003