Aunt Harriet
A person (usually a relative) who seems to either be drawn to (or more apt to like or take the side of) the people who are most toxic to you. Coined after Aunt Harriet from the old (Adam West) Batman series who, if she liked a fad, you can bet that it was a front for the villains.
Aunt Harriet by Lucette Lapointe December 9, 2008
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