In slang, crop-dusting is the act of moving while passing gas, usually silently, thereby “dusting” other people or an area with the gas.

What does the term crop duster mean?

: a person who sprays crops especially with fungicidal or insecticidal dusts from an airplane also : the airplane thus used.

What is crop dusting in restaurant?

Crop dusting= This refers to a server who walks through their own, or another's, section and quietly rips ass. This technique is used to punish those who ride us by providing them a toxic cloud of gas.