The phrase references outfits designed for infants, specifically mimicking the appearance of flightless aquatic birds during a holiday traditionally associated with disguises and celebrations. These outfits typically involve black and white fabrics, sometimes with orange accents to represent the beak and feet of the animal.
The rising popularity of such attire reflects a trend towards themed celebrations and a desire for unique and memorable infant apparel. Parents seeking distinctive and adorable looks for their children during festive events often gravitate toward representations of animals known for their endearing qualities. This inclination is supported by the human tendency to find comfort and joy in mimicking nature, particularly through depictions of charming creatures.