Crop-dust

Crop-dusting /ˈkräp ˌdəst/ is the noun of the word Crop-Dusting describing the action of blowing marijuana in the from of smoke at some one, in particularly the face/nose and mouth , this person may or may not wish to inhale the smoke though. This is not only for marijuana and may be used referring to any or all drug that can be used in the form of a vapor or smoke. While this action has been popular since the 1960s this phrase has been keyed in the 21 century.

John: Why isn't Jimmy smoking?
Tom: I don't know!
John: We should go Crop-Dust him!

Tom:Sure