Teenagery

Noun. When two teenagers are in a relationship and one of them cheats on the other with another teenager.

Cheerleader 1: My friend Lucy said that her friend Sally saw Brenda's boyfriend kissing another girl
Cheerleader 2: Isn't that Adultery
Cheerleader 1: How can it be adultery if they are not adults? It's teenagery

Teenagery

a word to describe someone who acts like the stereotypical teenager

i am very Teenagery!