BIG Naughty (빅나티), born Seo Dong-hyeon (서동현) on June 2, 2003, is a South Korean rapper, singer and songwriter whose music brings melodic rap into conversation with alternative R&B, acoustic pop and rock. He became known to a wider audience through Show Me the Money 8 in 2019 and joined H1GHR MUSIC. His solo debut recording, Where It All Started Remix, arrived on November 21, 2019.

BIG Naughty’s first EP, Bucket List (2021), drew on both hip-hop traditions and sung melodies. He followed it with NANGMAN in 2022, a romance-focused project that helped establish songs such as Beyond Love featuring 10CM and Romance Symphony among his best-known recordings. In an interview with EnVi Media, he described his desire to express romance through his own songwriting rather than remaining within a single genre. His music often moves between playful storytelling and vulnerable reflections on relationships.

The 2023 projects Hopeless Romantic and ICN > YVR reflected a more introspective direction. His releases during 2024 and 2025 moved freely between hip-hop, pop and collaborations, including the digital single MUSIC with LEE CHANHYUK. These are credited to his own recording career, not to the H1GHR MUSIC compilation albums on which he has also appeared.

In February 2026, BIG Naughty released Between Cobalt and Navy, exploring complicated emotions through a mixture of singing and rap. Still Freestylin’ followed in May, alongside a two-track single featuring Dynamic Duo. His July EP, Hopeful Romantic, brought a more optimistic approach to stories about affection and memory. Its title song Flower features HAGA; additional collaborations include Jay Park, Dynamic Duo and Loco.

On August 31, 2026, he released Nostalgia, a digital single paired with a band version. The songwriting reflects on the value of earlier experiences, including mistakes and regrets, and how they shape a person’s identity. His first standalone solo concert, ICN > NTG, took place in Seoul in July 2026, underscoring the scale of the audience he has developed since debut. Overseas interviews and label videos show how his music has become a personal record of adolescence, young adulthood and the people who inspired him.