1 definition by mortivorous
The passing lane occurs while you are taking a shit with the poop hanging from your anus and then let out a fart with enough force that causes a vacuum effect causing the shit to retreat back into the anus.
Bob: why is John taking so long in the bathroom?
Joe: I heard him swear after some explosive flatulence. He must have used the passing lane.
Joe: I heard him swear after some explosive flatulence. He must have used the passing lane.
by mortivorous November 1, 2014