The act of shoving a broom stick up someone's ass while they proceed to take a hot steamy shit. Said act causes an abnormal explosion of fecal matter covering both participants in feces. Once finished, the broom wielder "dusts off" the stick with his/her tongue.
guy 1: i heard what you did to sally last night.
guy 2: oh yeah the old Bulgarian Crop Duster, it's one of my specialties.