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1 definition by Caleb StoneCasa

 
1.
Noun: when a fart slips out around a turd that is currently making its way out of the asshole without pushing the turd completely out before it fully escapes. A bypASS can be declared if the fart in question is exiting the anal cavity while the said turd is currently crowning and does not cause any part of the feces to fall into the toilet.
When Valerie was in the midst of dominating a very large shit in the bathroom, a rather large bypASS made its way out of her ass while she had only pushed the tip of the poo out.

or...

I could not smell how bad my shit was until the bypASS came out and around my turd into the air of the bathroom.
by Caleb StoneCasa March 13, 2012