He was having dinner at Beauty World Food Centre when he spotted a rat defecating near him.
Stomper Milton was so disgusted by the incident on Jan 14 that he reported it to the authorities.
Raising concerns about a "massive, uncontrolled rodent infestation," Milton said: "I spotted a rat defecating into one of the stalls on a pipeline of the food centre when I was having my dinner there. Another rather large one was stuck above the false ceiling of the Pink Candy Korean Restaurant stall.
"I instantly felt disgusted and sickened, and wondered if any of those droppings had entered food that was being prepared at the various stalls below.
"I also noticed that hordes of rats would crawl to and from the metal pipes, wire cables casings and into a garden located on level 5.
"This is the worst hawker centre of our country, in terms of hygiene standards. It resembles more like a hawker in neighbouring Johor Bahru than in Singapore!"