See shank for root
definition.
Verb: to lift up your leg or ass cheek and deliver a rousing fart at the exact same time as a loud noise, to avoid being heard, much like the lead character in The
Shawshank Redemption hit the pipe with the stone during the storm.
I was at my girlfriend's house
watching a movie with her parents, and I really needed to shank one, so I waited until an explosion and shawshanked it
perfectly. They
never heard a thing so no one knew where the smell came from.