Brat Summer is a cultural phenomenon that exploded in 2024 following the release of Charli XCX's sixth studio album, Brat. The aesthetic is defined by a distinctive, high-contrast shade of lime green and low-resolution Arial font, representing a departure from the 'clean girl' aesthetic toward something more chaotic, honest, and hedonistic. What began as a minimalist album cover quickly morphed into a lifestyle and a widespread internet meme, where users swap the word 'brat' for other relatable phrases, names, or feelings. The trend has transcended music, influencing global fashion, social media marketing, and even political campaigns, serving as a defining symbol of unapologetic authenticity and high-energy summer vibes.