- Country: Philippines
- Genres: Action, Crime, Drama, Mystery, Thriller
- Release: 1994-11-01
- Director: Lino Brocka
- Writers: Ricardo Lee
- Language: Filipino | Tagalog | English
- Stars: Christopher De Leon , Dina Bonnevie , Charo Santos-Concio , Bembol Roco , Allan Paule , Francis Magalona , William Lorenzo , Perla Bautista , Eddie Garcia , Anita Linda
- Runtime: 120 min
- Awards: 7 wins & 13 nominations
- AKA: Dirty Affair (Japan) , Dirty Affair (United States of America) , Dirty Affair (Philippines) , Dirty Affair (United Kingdom) , Dirty Affair , Gumapang ka sa lusak , Doro no naka wo oyoge (Japan) , 泥の中を泳げ (Japan)
- Plot: A teenage boy befriends a starlet who is having an affair with an ambitious mayor. As elections are coming up, the mayor's wife wants him to get rid of his mistress. The starlet agrees to stop the affair on condition that the mayor help release her boyfriend from jail. The mayor agrees, but wants the former jailbird to kill his political rival .
- IMDB:tt0099717
Gumapang ka sa lusak Cast · · · ALL
Lino Brocka
Director
Dina Bonnevie
Rachel Suarez
Christopher De Leon
Levi
Eddie Garcia
Mayor Edmundo Guatlo
Charo Santos-Concio
Rowena Guatlo
Bembol Roco
Falcon
Allan Paule
Jonathan
Francis Magalona
RJ
William Lorenzo
Eric
Perla Bautista
Rachel's Mother
Anita Linda
Levi's Mother
Lucita Soriano
Jonathan's Mother
Timothy Diwa
Dodo
Maureen Mauricio
Movie Actress
Ernie Zarate
Rachel's Father
Ray Ventura
Ricardo Tuazon
Tess Dumpit
Gigi