"Gashina" is a song recorded by South Korean singer Sunmi. It was released as a CD single and digital single by Makeus Entertainment and The Black Label on August 22, 2017, and distributed by LOEN Entertainment. "Gashina" is Sunmi's first release since the disbandment of Wonder Girls and the expiration of her contract with JYP Entertainment. It was released as the lead single from her second Korean-language EP Warning.