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One of the fast-food industry’s deliberately worst-kept secrets is In-N-Out Burger‘s so-called “secret menu.” The items are actually listed on In-N-Out’s official website, but not on menu boards inside the restaurants.

Most die-hard fans of the California-based restaurant chain are fully aware of the menu, which consists of six official items:

“Double meat” is a burger with an extra beef patty. “3X3” is a burger with three patties and three slices of cheese. You can probably guess what a “4X4” is. Diners can also order “grilled cheese,” which has two slices of cheese and no beef patty, or “Protein-style,” a burger wrapped in lettuce instead of a bun.

Finally, the popular “animal style” burger comes with a mustard-cooked beef patty, an extra pickle, extra spread and grilled onions.

In N Out Burger
In N Out Burgers, protein-style (left) and animal style (right). (Getty Images)

Those are the only officially sanctioned “secret menu” items.

There are others, however, that In-N-Out workers will typically accept, like the Flying Dutchman (two slices of cheese, two beef patties and nothing else), Lemon Fries (French fries with lemon juice squeezed on top), and a Neapolitan Shake (chocolate, vanilla and strawberry).

Then, you have items that are rumored to exist, but employees say they are totally fake.

As SFGate reports, a handful of social media groups and subreddits are filled with comments from purported In-N-Out employees who are fed up.

For example, they insist there is no such thing as “doggy-style fries,” supposedly topped with cheese and chopped-up hot dogs. In-N-Out doesn’t serve hot dogs.

“Monkey-style?” Nope. The Instagram account Hungry Hotline posted a video claiming you could order this secret burger with “animal-style fries” in the stack.

As of Friday, the video had amassed over 120,000 views.

In-N-Out CEO Lynsi Snyder herself chimed in, posting a thumbs-down emoji in the comments.

“No in n out will honor this. We’re gonna laugh at you if you order it,” read another comment from a person claiming to be an employee.

“As an In-N-Out worker: Stop,” read another.

Despite the backlash, there are several unsanctioned, unofficial “secret menu” items that In-N-Out claims do not exist, but KTLA’s Andy Riesmeyer found otherwise.

Among them are “roadkill Fries” with hamburger meat crumbled on top and a “Scooby Snack,” which is just a patty in a wrapper.