oignon vert

Etymology
From.

Noun

 * 1)  meter maid

Noun

 * 1) green onion
 * 2) spring onion
 * 3) scallion
 * 4) shallot
 * 5) chive

Etymology 2
From the colour of the cars driven by the parking enforcement and ticketing division of the city of Montreal at the time that this term was coined.