They were shut down over some beef.

A group of foodie friends went viral for using a pulley system out their second-floor window to deliver home-cooked steaks to customers on the street — but a mystery rat soon spoiled their quirky culinary escapade.

The buzzy makeshift biz, dubbed Some Guy’s House, was forced to shut down after just four days of slinging steaks.

“I guess we have like at least one, like, mega-hater out there,” said Chianli Hang, a chef and tenant of the McKibben Street unit, to The Post.

Hang, 24, and five of his friends started Some Guy’s House in late October as an offbeat way to make good food and fun social-media content.

Several members of the crew had kitchen experience and wanted to experiment with recipe testing, he explained.

“We were just doing this as like a fun bit with our friends. We would sit on the couch like, ‘Man, will anyone actually watch a video and physically go here and then give us money for some steak out a window?’” Hang said.

“And the answer was, ‘Yes!’ “

Some Guy’s House, which only operated Thursday and Friday evenings, sold just three meals on its first night but then a surprising 11 the next day.

That’s when the clever endeavor blew up on social media — with influencers coming to review their bizarre food schtick as invitations were offered to collaborate with Michelin-rated chefs.

The friends skirted around potential city health-code violations by advertising as a business that sold $25 stickers that came with a free steak.

The innovative chefs cooked up an original pulley system to deliver their meals from their McKibben Street window.

And the business was far from profitable. It actually cost the group of friends several hundred dollars in food and equipment costs to pull off.

They had only planned to run the restaurant for one more week, anyways, prepped to deliver 100 pre-orders, and were considering having a DJ send the venture off with a bang when the mystery tattler brought down the meat cleaver early.

“We were really excited for [the send-off] But then we got shut down,” said Hang, adding that their landlord was the one who delivered the bad news that a single person had lodged numerous complaints to the city.

“He thought that we were maybe like running like a full-scale, like, commercial-kitchen operation out of here.”

Six complaints were filed to 311 over the crew’s pop-up restaurant, two of which resulted in the city Department of Health submitting written warnings to the landlord over potential violations, records show.

It’s not clear if the chefs were slapped with any violations from the city for their sketchy venture. The complaints are still under investigation.