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.