A large defecation. A fecal emission of such proportions as to "dust the bowl" as it spins with the flush. Usually, great relief is enjoyed thereafter.
"Dude, after that serious eat-down at the barbecue place, I went home and totally had to bring out the bowl duster."
The act of not wiping your ass for any extended period of time until a crusty layer of dookie builds up. Then you proceed to fart on another human beings face.
A bedroom maneuver that can be exercised by both males and females. Upon initiating sexual contact with said partner, as you are about to climax swiftly pull out a feather (preferably an eagle feather or other endangered animal feather although this is optional as using said feathers only adds cool factor) then tickle your own nose with said feather just as you are coming and it will be at least 1/10th of a better orgasm! Variations of the feather duster include reverse featherdusting, team featherdusting, the dustyblumpkin, and what is commonly referred to as "the french maid".
I heard that when you sneeze, it's 1/10th of an orgasm, so as I was fucking this chick I pulled the feather duster on her and was in heaven 1/10th more than I would be normally!
A gay man's soul patch. This tuft of hair just below the lower lip will dust the bottomshaft of any cock that happens to be insertered in the gay man's mouth.
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.