When it is so cold outside that when one farts, water vapor is seen from the farters ass. Exactly like a cars muffler in winter.
Dude: Fuck it's cold as shit outside!
Guy: No shit, I saw folks leaving church this morning and this one dude was kind enough to hold his fart the entire service. He definitely had a Canada Exhaust Pipe.
by WholePriest December 28, 2011

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