Why wouldn't it be? Old dictionaries are riddled with errors and mistranslations.
βλαύτη is just a slipper. Not a slipper worn by fops. Not a slipper worn by lesbians. Not a slipper worn by aliens. Just a slipper.
Why do you keep insisting that the Professors are wrong and that this "worn by fops" translation should be retained? Are you an expert in Ancient Greek translation and you're sure they have it wrong?