Seo Dong-hyeon (Korean: 서동현; born June 2, 2003), known professionally as Big Naughty (Korean: 빅 나티; stylized as BIG Naughty), is a South Korean rapper, singer and songwriter. He first garnered attention when he appeared on the rap competition TV show Show Me the Money 8 in 2019. He signed to H1ghr Music where he released the extended plays Bucket List (2021) and Nangman (2022).