Mutt Boy (Hangul: 똥개; RR: Ddong Gae; lit. "Shit dog") is a 2003 South Korean film starring Jung Woo-sung, Kim Kap-soo and Uhm Ji-won. A developmentally-disabled boy grows up in a rural town, and eventually attracts a small gang of followers due to his fighting skills. However, he keeps getting into trouble with the law, and getting picked up by his father, who works as a police officer.