The Woman in the Septic Tank (Filipino: Ang babae sa septic tank) is a 2011 Filipino comedy film directed by Marlon Rivera, written by Chris Martinez, and starring JM De Guzman, Kean Cipriano, Cai Cortez and Eugene Domingo.

They set out to do a quick pre-production as a courtesy call to their lead actress played by Eugene Domingo, and a thorough inspection of their film's major location, the Payatas dumpsite.

It is the first full-length film to have its audience tickets sell to its maximum capacity within ten days of showing at the festival.

He also praises the performance of lead actors Cipriano and de Guzman, calling it "spot-on as the guys with one eye on the slums and the other on travel and trophies.

"[10] Meanwhile, Maggie Lee of The Hollywood Reporter says the film is "a lambast of the pretensions of independent cinema in his country and his fellow filmmakers' inflated egos."

She also compares how the film replays specific sequences, each with narrative or stylistic revisions, to "a Groundhog Day of pilot filmmaking.