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.
The act of farting while walking past others, leaving them to gag in the wake of your shit-smelling foulness. Can also be referred to as the airdrop.
Ron: "So there I was just typing away at my desk, then I smelled it....that wretched odor that could only be caused by someone cropdusting."
Jim: "Oh man I've smelled that before! I think it's that new foreign girl Yun Li. She pulled an airdrop over at my desk the other day, and I threw up in my mouth a little."