The phrase indicates suggestions for attire intended to be worn by a group of four individuals, typically for events such as Halloween, themed parties, or theatrical productions. An example includes dressing as characters from a well-known fictional quartet, such as the Teenage Mutant Ninja Turtles, or as a cohesive unit representing a singular concept, like the four seasons.
Selecting coordinated outfits for a group fosters a sense of camaraderie and enhances the overall aesthetic impact of an event. Such choices allow for creative expression, provide opportunities for collaborative planning, and often result in memorable photo opportunities. Historically, group costuming has been a feature of celebrations and performances, evolving alongside societal trends and popular culture.