A bottom-louie.
Someone whose fetish is to think of the male singer Louis Tomlinson as a bottom.
They usually like to refer to him with she/her pronouns, think his physical features are similar to a woman's, want him to dress more feminine, joke about the size of his penis compering it to a
vagina or clitoris,
ship him with any
man that comes close to him, write nasty fanfiction about him bottoming, and reject any idea of Louis being a straight
man, being masculine or being a top.