The phrase identifies a category of attire intended for celebratory occasions, specifically October 31st, designed to resemble a nocturnal flying mammal and tailored for adult females. This specific type of outfit is commonly worn during Halloween festivities.
The significance of these outfits lies in their ability to embody a popular symbol of the holiday, connecting the wearer to established cultural themes of mystery and the supernatural. The outfits can offer wearers a chance to express creativity and participate in seasonal celebrations. Historically, costumes have allowed individuals to temporarily shed societal norms and embrace fantasy.