A SHOPPER has revealed a little-known Walmart self-checkout trick that could save you time when paying and get you out of the store in a flash.

Amy Whitsel Johnson shared a TikTok video showing a hidden compartment on Walmart's self-checkout machines.

The TikToker wrote in the video: "Shocking the self-checkout registers with change."

As her son, who's a visually impaired Walmart employee, lifted the coin slot on the machine and exposed a larger coin drop opening on the register she said they'd "show everybody the trick."

Amy, who goes by amywhitseljohnson on TikTok, told her son Lex that a lot of people don't know that you can put a handful of coins into the machine at one time.

"They think you can only put one in at a time," she added.

While they were loading coins into the self-checkout machine, the screen text over the video said: "Next time you pay with cash, try it."

"No more putting one penny in at a time."

Lex explained that shoppers can also put more than one bill in the machine at a time, adding that it "depends" on how many they have.

He then demonstrated this by feeding a stack of dollar bills into the register.

As her son held the cash in the machine, it quickly pulled the bills in one by one.

With more than 1,100 likes, a number of Amy's followers chimed in with their curiosities and opinions about the hack.

"It also works good if u don't want to use coin star. saves u the fee," a TikToker said.

"Never counts the change right," someone else added.

"It drops a few coins but seemed to count his right," Amy replied.

"They yell at you if you use it it's only for them to reload it," another person said.

Amy replied saying: "I use it all the time."

Some other user asked: "So I can bring in a 3/4 inch funnel and my 20lbs jar of coins in to get counted for free?"

"Headed to Walmart now," they added.

"Not going to work," Amy said with a laugh.

Before you head to checkout, you may want to take a look for any "hidden clearance" items.

These products are either not visibly marked down, or sometimes have the wrong sale sticker on them.

However, the prices have already been updated in Walmart's registers, so you can still get the savings.

Savvy shoppers use the Walmart app's Scan and Go feature to scan products in the store and find accurate prices.

These deals give shoppers incredible savings of as much as 90 percent with prices going down to just a few cents.

For example, one shopper found a $188 hoverboard marked down to just $29.

In other Walmart news, a popular drink sold at the store has been recalled.

Walmart is also making a huge change involving drones to get customers their items fast.

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