To suddenly release a fart in such a way that an unsuspecting victim is lightly 'dusted' with the gas molecules. This can be done in two ways, by either walking in front of the recipient as you let 'er rip, or by planting the bomb booby trap style in such a manner that they unknowingly walk through it.
Man, I totally just cropdusted you. At least it's better than a Covered Wagon.
Farting, silently, as you walk by someone you either want to move out of the way or leave. Only works in crowded areas where you can't be discovered as the farter. Good technique for waiters whose tables are "camping out".
"I wish those people would leave. Should I go and cropdust them?"
A term used by servers in a restaurant. When you have a table of assholes, you ask a co-worker if they can "crop dust " the table. As they pass by the table, and trail a nasty fart around said table. this keeps you blameless.
Dude, Will someone please crop dust table 15, the've been giving me shit all night.