A person who always pays too much for things, locks herself out of houses, constantlycomplains about sports on TV in group settings, and is always posting pictures of cats on Facebook.
Usually married to Uncle Dad, and related to cousin Grandpa. Also could be the victim/result of incest. Homemade hooch in the backwoods of the Ozarks are cited for this phenomenon.
Kid in School: "Holy crap Sarah Belle!! Little flipper footed Jimmy thinks his Mother is Marie Osmond! He is seriously messed up"
Girl in School: "Little Jimmy is crazy.. Come to think of it, his dad is named Donnie!! She could very well be Aunt Mom!!"