A high schoolfreshman. Most often referred to this around homecoming time. This term comes into play because at the game, seniors will hunt out freshmen and "green" them. In other words, freshmen will be attacked with green sharpies or buckets of green paint.
Everyone admired my new Prius and the solar collectors on my house, till my neighbor bought an all-electric car and put up a wind turbine. Now I'm suffering from profound greenness envy.