They thought it was a real Shake-down.

Just in case guilt tipping wasn’t already running amok. An incensed customer has accused Shake Shack of raising the prices on their order after they didn’t leave a gratuity at the self-checkout kiosk.

“My wife says that if you don’t tip at Shake Shack, they make it more expensive per item,” declared TikTok creator B.D. Powell in a video with 4.2 million views.

He decided to test this theory by ordering three classic shakes — a vanilla, cookies & cream and strawberry — at a branch at an airport in Salt Lake City.

The Post reached out to Shake Shack for comment.

They cost $5.99 each according to the order…

Read the full article at NYPOST.COM