“Thanksgiving” (** out of four) was a stale slasher thriller set on the title holiday in which the residents (Patrick Dempsey, Rick Hoffman, Gina Gershon, and others) of a small Massachusetts town are terrorized by a homicidal slasher on the loose sending all of them into a maddening frenzy as they scramble to find out who the real killer is. No turkey but not anything to be especially thankful for either. Director Eli Roth packs in his usual gore and has some inventive kills but can’t keep film from feeling like a routine leftover from the 80’s. Either way, film is nowhere near as humorous and entertaining as the 2007 “Grindhouse” trailer that inspired it.