'The Texas Chainsaw Massacre' (1974)
Because the kin that slays together stays together. Seriously, hear us out: Both food and sharing a meal with your family are a key part of this horror-movie landmark; and we swear we've had at least one Turkey Day dinner that's eerily similar to that sit-down with the whole Leatherface gang. (We may have even let Grandpa do the sledgehammer honors.) This is the film that gives new meaning to the term "blood relations." Just don't watch it while you're digging into the leftovers.