Passing gas in a stealth manor, usually while walking through a crowd or a group, so that someone else gets blamed for the stench, or at the very least people besides the assailent must suffer it.
The restaurant's so busy tonight that you can get away with cropdusting your own section
When crop dusting does NOT work:
1. on a treadmill (no matter how fast you walk or run)
2. with a strong tail wind
3. with a turnaround - for example, you crop dust while walking with your girlfriend, then she turns around and walks back to look at a display in a storefront window.
When someone cuts a fart as they walk by others at their work place and then exits the scene leaving the people behind to fight about who did it.
Kevin enters room. (Kevin farts quietly while walking by, leaving immediately) Harold-"I think Kevin just dusted us dude" Jeremy-"Yeah, now he is probably going to Uncle Ted it in the bathroom for a while." Jason-"Why is he always CROP DUSTING anyway?" Brenda-"He eats a lot of cabbage at Addel's hot tub parties the other day he even dropped a tub trout." Kevin-"I think I just made a crop CIRCLE in my pants"
A term of art among flight attendants: farting while walking casually up and the aisle of an in-flight airplane pretending to be checking on passengers.
Jane: Wow! That burrito that I had just before we left really is wreaking havoc with my stomach.
Sally: No problem. Just take a few minutes and do some crop dusting. I'll cover for you.