Greenies are year 10 and 11 students that attend UTC. You can identify these creatures by there green lanyard and beta aura. They are fuelled by the nicotine that they vape in the bathrooms. Theses plebeian scum can drop your IQ if you get too close.
The art of skillfully gesturing someone to roll down their car window at a stop light after witnessing them successfully pick their nose and eating it, by a using hand cranking gesture. When they roll their window down ask them if they would be willing to trade you "2 greenies (2-GREEN colored boogers) for a blackie." (a BLACK colored booger)
A) Letting them know you actually watched them the whole time, while they excavated around in their nose for their boogers & then ate them.
B) Embarrassingthe fuck out of the nasty bastard for subjecting you to having witness that disgusting act they performed while in traffic, at that stop light.
C) Hopefully reminding them in not so many(unspoken)words, other than what you already said to them- it's a filthy habit that they should have given up as a small child.
"Hey dude that looked pretty tasty, and I didn't have my lunch yet. Yours look way
better than mine, bummer. Next time I'll trade you 2 greenies for a blackie."