weed chemtrail 

Also, weed contrail. The odiferous trail left behind an automobile in which significant amounts of smoked marijuana is being consumed.

From weed, slang for marijuana, and chemtrail, a conspiracy-theorist's variant on contrail, the condensation trail left behind by a jet airplane at high altitude.

Dude, did you get a whiff of that Lexus that drive by? It was leaving a serious weed chemtrail.

weed chemtrail by x Chicagoan April 21, 2017