What is this movie called?

i wacth this movie whan i was 13 and lost it.

the story is about a monster in the sewer killing people in the dark or next to sewer in the end two cops ate at a burger shop and two monsters came and killed them.

in the beginning of the movie a woman walks her dog in the night and walks to a sewer hole and gets taken by the monster.usWhat is this movie called?
C.H.U.D. (Canibalistic Humaniod Underground Dwellers)?
defiantly Canibalistic Humaniod Underground Dwellers (CHUD) u can look it up on Wikipedia. It has the whole movie plot and storyWhat is this movie called?
c.h.u.d.