Mutt Boy
Hangul	똥개
Revised Romanization	Ddong gae
McCune–Reischauer	ttonggae
Directed by	Kwak Kyung-taek
Written by	Kwak Kyung-taek Kim Jang-woo
Produced by	Jung Jong-seob
Starring	Jung Woo-sung Kim Kap-soo Uhm Ji-won Kim Tae-wook
Cinematography	Hwang Ki-seok
Edited by	Park Yu-kyeong
Music by	Yun Min-hwa
Distributed by	Show East
Release date	July 16, 2003 (2003-07-16)
Running time	103 minutes
Country	South Korea
Language	Korean

Mutt Boy (Korean: 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 against the law, and getting picked up by his father who works as a police officer.

Plot

Chul-min's family consists of himself, his police detective father, his sick mother, and a dog. Chul-min calls the dog "Mutt" or "Stray Dog," but his father calls Chul-min "Mutt" too. The dog is Chul-min's best friend. He doesn't cry when his mom dies, but he does get furious when his dog is eaten by the older boys in his soccer club. He takes his revenge, but his father's patrol car awaits him. Although he now must live on his own, Chul-min wins renown as the one who beat up 21 people all by himself. Many of the town's thugs start to hang around Chul-min, fascinated by him, and he becomes a leader of small-time gangsters. One day his father takes in a young orphan named Jung-ae who was a thief. Eventually Chul-min and Jung-ae develop feelings for each other and Chul-min confronts the gang who killed his beloved dog.

Cast

• Jung Woo-sung – Cha Chul-min
• Kim Kap-soo – Chul-min's father
• Uhm Ji-won – Kim Jung-ae
• Kim Jung-tae – Jin-mook
• Hong Ji-young – Soon-ja
• Yang Joon-kyung – Oh Deok-man
• Lee Soo-ho – Dae-deok
• Kim Sang-ho – Jang-son
• Park Sang-gyu – Detective Park
• Heo Wook – Gye-hwan