You can acquire Meat by slaughtering NPCs and carving them. Average human gives around 40-45 pieces of meat, that are about as nourishing as lynx meat. There does not seem to be any penalties or repercussions from extraordinary forces for these acts. Human meat can be smoked, roasted, dried or salted. If you learn your victim's name before slaughtering it, that name without capitals will be attached to the resulting meat.
As of Version 3.32, human corpses cannot be butchered for meat unless the player character is starving.