During the winter weather months and dry road salt powder has accumilated on the shoulder of the interstate. If you are a truck driver, you can guide your trailer off and on the shoulder to get them pesky cars or other tailgaters off of your ass!!
Trucker:(watching through his mirrors & laughing) "I am crop dusting your ass!!--how do ya like that!!"
passing gas while walking, sometimes in hopes of not being present when the smell is realized, sometimes as a means of torturing a number of people at once.
Jim cropdusted the cubefarm at his office and nearly killed 20
To covertly release intestinal gas while walking. Coined in 1985 on a Northwest Airlines flight from Boston to Frankfurt by Sol Squire, on-board translator, who had just walked the length of the DC-10 aircraft and noted he had "crop dusted" the passenger load.