Pubertocracy
When kids that are farther into puberty are considered better and cooler than the less developed ones. It's common in middle and high schools.
13 Year old kid: -Whoa, i'm better than you little 12 year old kid, im 13! Look, you don't even have hairs down there!
12 year old kid: -F***ing pubertocracy.
12 year old kid: -F***ing pubertocracy.