A person who wears vintage clothing, especially from the swing dance era (late 1920s to 1940s), as everyday apparel, as opposed to wearing it only for special occasions. See also retrovestry
From 'retro', a Latin-derived prefix meaning backwards, which today often refers specifically to the imitation of fashions from the recent past, and 'vest' (Middle English: from Old French vestiment, from Latin vestimentum, from vestire 'clothe', or from the Italian vestis, meaning 'garment'), plus 'er' a suffix descriptive of a person of a type described by the rest of the word.
I'm not a true retrovester. I can't find any vintage nicotine patches.