(noun) Eastern Washington slang used in reference to a person who is disliked for being really fake or two-faced.
often times, people who qualify as effigies put on a false act that they are really nice or caring, but if you get to know them better or under different circumstances you find out that they're actually extremely rude or uninspiring; completely different than the original image they give. They're not true to who they really are when they're around other people, and will change how they act according to who they're with at any given time.
Girl A: Agh! I HATE that girl! she is so annoying! she's always acting super nice around Nick and Jake, but then, when they're not here, she is a total BWITCH to everyone else!!
Girl B: Omgosh! i knooww! she is such an EFFIGY!!
Girl A: Legit!