Teenage Dirtbag is a 2009 drama film written and directed by Regina Crosby and starring Scott Michael Foster and Noa Hegesh.
At an Idaho IGA store, a pregnant woman named Amber Lange runs into an old classmate and learns that Thayer Mangeres, a boy they went to school with, recently died after jumping into a river.
Shaken, Amber reflects and flashes back to her days in high school as an unhappy but popular cheerleader and her interactions with Thayer, a “problem kid”.
Amber, sharing the experience of a loveless home life due to her parents often being absent, picks up on the subtle messages in Thayer's written work.
Amber silently offers Thayer an orange later that day during Study Hall, and this opens the door to the pair developing a very private friendship.
After reading a few pages, Tabitha runs out of the classroom and the notebook is quickly passed around, humiliating Thayer and exposing his private messages to the whole school.
Later, Jeannie is standing in the doorway of a hospital room, smiling with tears in her eyes as she looks upon Amber holding her newborn baby boy, who she has named Thayer.