What it's about: Jim Caroll (DiCaprio) is on an incredibly successful high school basketball team, but off the court, his best friend Bobby (Michael Imperioli) is dying of leukemia. When Bobby dies, Jim's life begins to unravel as his dependence on cocaine and heroin increases. And in order to pay for the drugs, he finds himself stealing, mugging, and prostituting himself.Biggest asshole moves: He gets high on heroin and yells at his mom (Lorraine Bracco) about being a maid, he mugs an old…