Cry-Baby (1990)

Allison is a "square" good girl who has decided she wants to be bad and falls hard for Cry-Baby Walker, a Greaser (or "Drape" in John Waters parlance). Spoofing Elvis movies and Juvenile Delinquency scare films of the '50s, this movie follows the adventures of Cry-Baby who, though he is sent to juvie, is determined to cross class (and taste) boundaries to get Allison back.