Taboo (2002)

When Christian Turner gathers together his fiancée Elizabeth and their friends Adam, Benjamin, Piper and Katie to celebrate their high-school graduation, they play the cheeky card game 'taboo' which anonymously confides their secret vices to paper. The following year Christian inherits the grand estate and invites them back for New Year's Eve. This time the games are far more serious, but go way weirder then anyone planned, with several unexpected twists.