|1.||Clearing the runway|
Wiping your ass before taking a dump, clearing any debris that may obstruct the poop from coming out smoothly.
guy 1: Dude, arent you supposed to wipe AFTER you take a crap?
guy 2: Man, I'm clearing the runway. Last time there was so much lint and hair stuck up there, my crap came out like a play-dough french fry maker.