Short for "Anonymous Confession Board" that students at a certain university use; online confession board that is often abused by overly passive-aggressive students who don't know how to take jokes use to voice their childish opinions; online confession board which some students use to insult innocent students and to validate their meaningless existences; online confession board which many students who don't know the value of communication use to compensate for their inner selves; online confession board which help some students feel wanted by creating a false sense of community through insulting another human being; online confession boards abused by idiots who don't know understand basic problem solving; online confession board abused by idiots
"OMG! Did you hear that Tyler wrote shit about her on the ACB?"
"Fuck that shit. The ACB is stupid. It's what people use to create drama when they're bored."