In October, the full trailer for the new Jason Reitman film Young Adult hit the web. It was quirky, funny and most of all it reminded us that petty high schoolers grow old but they don’t always grow up. Today we get a small taste of what is really in store for us as we see the beautiful Charlize Theron channeling Diablo Cody’s not so beautiful writing. For those faint of heart, have look at the green band trailer. For those of you who need a short but bitter mid-Tuesday wake up shot, look no further… Charlize plays Mavis Gary the foul-mouthed divorcee returning to her old life in small-town suburbia and…